There are over 58, 000 rocky objects in _______ space, about 900 of which could fall down onto _______ earth.A．the; theB． 不填; theC．the; 不填D．a; the
There are over 58, 000 rocky objects in _______ space, about 900 of which could fall down onto _______ earth.
A．the; the
B． 不填; the
C．the; 不填
D．a; the
相关考题：
Which is true about over－thinking? () A、Men are far more inclined to ruminate about the stressors and disappointments they encounter.B、All ruminations are abnormal.C、Over-thinkers go over and over what happened in future.D、Both the brain and experience are the factors in overthinking.
Wood carving refers to the art of creating or decorating objects of wood by carving with a sharp, hand-held tool. This form. of art has a history of over 1,000 years and a unique artistic style. The following is some introduction about wood carving in America.Wood carving began as a necessity in America and developed into an art. Because of the lack of other materials, early settlers were forced to make tools and utensils out of wood. At first, these articles were whittled with a knife, but when pioneer craftsmen set up their primitive shops most of them were fashioned on a lathe--a machine which holds an object and rotates it while it is being shaped by a tool.However, even after Massachusetts-born Thomas Blancard designed a lathe which could turn irregular shapes--an innovation that made possible mass production of gunstocks, shoe lasts, oblong and square wooden wares--craftsmen who could use knife and chisel skillfully were still in demand. Some found ready employment in shops of cabinetmakers, while others, carved decoy. Still others specialized in creating shop signs, ship figureheads, or in decorating interior woodwork. A few even accepted commissions to make busts of prominent citizens.This passage most likely came from a longer work about early American ______.A．arts and craftsB．political leadersC．logging industriesD．fashion design
Before relativistic particle physics, the constituents of matter had always been considered as being either elementary units which were indestructible and unchangeable, or as composite objects which could be broken up into their constituent parts;
You use the segment advisor to help determine objects for which space may be reclaimed.Which three statements are true about the advisor given by the segment advisor?() A. It may advise the use of online table redefinition for tables in dictionary managed tablespace.B. It may advise the use of segment shrink for tables in dictionary managed tablespaces it the no chained rows.C. It may advise the use of online table redefinition for tables in locally managed tablespacesD. It will detect and advise about chained rows.E. It may advise the use of segment shrink for free list managed tables.
What did scientists learn about earthquakes at the Rocky Mountain Arsenal?A) They occur at about 4,000 metres below ground level.B) The injection of water into earthquake faults prevents earthquakes from occurring.C) They are usually caused by the oil in the faults.D) Harmful earthquakes earl be possibly prevented by causing small, harmless earthquakes.
Click the Exhibit button.Which two are correct about CIFS acceleration based on the exhibit?() (Choose two.) A. The statistics show savings for all CIFS traffic.B. The traffic transfered over 4,000 seconds faster.C. There was a bandwidth savings of almost 68.9%.D. The acceleration is only working for 68.9% of the traffic
A network technician is concerned about the environmental effects of power consumption and heat from network resources Limited space is also a concern. Which of the following technologies should be implemented?（）A. Circuit switchingB. Network address translationC. Power over EthernetD. Virtual servers
There are over 58,000 rocky objects in space, about 900 of which could fall down onto earth.A. the; the B.不填; the C. the;不填 D. a; the
When carrying a cargo of asphalt or molten sulfur，which are carried at temperatures of over 300°F，one of the biggest dangers is ______.A.water in the tanks or pipelinesB.having the cargo too coolC.explosion of vapors after dischargeD.inadequate ullage space
共用题干第二篇The Mir Space StationThe Russian Mir Space Station,which came down in 2001 at last after 15 years of pioneering the concept of long-term human space flight,is remembered for its accomplishments in the human space flight history.It can be credited with many firsts in space.During Mir's lifetime,Russia spent about US $4.2 billion to build and maintain the station.The Soviet Union launched Mir,which was designed to last from three to five years,on February 20, 1986,and housed 104 astronauts over 12 years and seven months,most of whom were not Russian.In fact, it became the first international space station by playing host to 162 people from 1 1 countries.From 1995 through 1998,seven astronauts from the United States took turns living on Mir for up to six months each.They were among the 37 Americans who visited the station during nine stopovers by space shuttles.The more than 400 million the United States provided Russian for the visits not only kept Mir operating,but also gave the Americans and their partners in the international station project valuable experience in long-term flight and multinational operations.A debate continues over Mir's contributions to science.During its existence,Mir was the laboratory for 23,000 experiments and carried scientific equipment,estimated to be worth $80 million,from many nations.Experiments on Mir are credited with a range of findings,from the first solid measurement of the ration of heavy helium（氦）atoms in space to how to grow wheat in space.But for those favouring human space exploration,Mir showed that people could live and work in space long enough for a trip to Mars.The longest single stay in space is the 437.7 days that Russian astronaut Valery Polyakov spent on Mir from 1994 to 1995.And Sergie Avdeyev accumulated 747.6 days in space in three trips to the space station.The longest American stay was that of Shannon Lucid,who spent 188 days aboard Mir in 1996.Despite the many firsts Mir accomplished,1997 was a bad year out of 15 for Mir.In 1997,an oxygen generator caught fire.Later,the main computer system broke down,causing the station to drift several times and there were power failures.Most of these problems were repaired,with American help and suppliers,but Mir's reputation as a space station was ruined.Mir's setbacks are nothing,though,when we compare them with its accomplishments.Mir was a tremendous success,which will be remembered as a milestone in space exploration and the space station that showed long-term human habitation in space was possible.But it's time to move on to the next generation.The International Space Station being built will be better,but it owes a great debt to Mir.We can learn from the passage that the Mir Space Station______.A:was designed to last over 5 yearsB:played host to 7 astronauts from different countriesC:was visited only by AmericansD:was built by Russians
共用题干Weight on and off the Earth We are so used to.our life on the surface of the earth that it can be quite an effort for our mind to break free of all the ideas that we take for granted.Because we can feel that things are heavy,we think of "weight"as being a fixed quality in an object,but it is not really fixed at all.If you could take a one-pound packet of butter 4,000 miles out from the earth,it would weigh only a quarter of a pound. Why would things weigh only a quarter as much as they do at the surface of the earth if we took them 4,000 miles out into space?The reason is this:all objects have a natural attraction for all other objects;this is called gravitational attraction.But this power of attraction between two obects gets weaker as they get farther apart.When the butter was at the surface of the earth,it was 4,000 miles from the center.When we took the butter 4,000 miles out,it was 8,000 miles from the center,which is twice the distance.If you double the distance between two objects,their gravitational attraction decreases two times two.If you treble the distance, it gets nine times weaker(three times three)and so on. So this is one of the first things we need to remember that the weight of an object in space is not the same as its weight on the surface of the earth. What about the weight of our pound of butter on the surface of the moon?At the distance the puii of the earth is about 4,000 times smaller than it is here on the surface,so we can forget all about the earth-pull on our butter. On the other hand,on the moon there will be an attraction between the butter and the moon,but the butter will weigh only about one-sixth as much as it does on the earth.This is because the moon is so much smaller than the earth.The amount of gravitational pull that a body produces depends on the amount of material in it.A packet of butter has a gravitational pull of its own;but this is very small in relation to the pull of something as large as the moon,or the earth,or the sun.According to the passage,"weight"should be understood in the sense thatA:it is fixed if it is outside the earth's gravitational puliB:it decreases four times when it is 4,000 miles from the earth's centerC:it varies with the change of the gravitational attraction between two objectsD:things increase in amount as they are closer to the earth's surface
共用题干Weight on and off the Earth We are so used to.our life on the surface of the earth that it can be quite an effort for our mind to break free of all the ideas that we take for granted.Because we can feel that things are heavy,we think of "weight"as being a fixed quality in an object,but it is not really fixed at all.If you could take a one-pound packet of butter 4,000 miles out from the earth,it would weigh only a quarter of a pound. Why would things weigh only a quarter as much as they do at the surface of the earth if we took them 4,000 miles out into space?The reason is this:all objects have a natural attraction for all other objects;this is called gravitational attraction.But this power of attraction between two obects gets weaker as they get farther apart.When the butter was at the surface of the earth,it was 4,000 miles from the center.When we took the butter 4,000 miles out,it was 8,000 miles from the center,which is twice the distance.If you double the distance between two objects,their gravitational attraction decreases two times two.If you treble the distance, it gets nine times weaker(three times three)and so on. So this is one of the first things we need to remember that the weight of an object in space is not the same as its weight on the surface of the earth. What about the weight of our pound of butter on the surface of the moon?At the distance the puii of the earth is about 4,000 times smaller than it is here on the surface,so we can forget all about the earth-pull on our butter. On the other hand,on the moon there will be an attraction between the butter and the moon,but the butter will weigh only about one-sixth as much as it does on the earth.This is because the moon is so much smaller than the earth.The amount of gravitational pull that a body produces depends on the amount of material in it.A packet of butter has a gravitational pull of its own;but this is very small in relation to the pull of something as large as the moon,or the earth,or the sun.We do not feel the gravitational pull of a packet of butter becauseA:it is too small to have a gravitational pull of its ownB:its puil is so small that we tend to ignore itC:its pui1 disappears in the presence of the earth's gravitationD:it tends to melt and loses its gravitational puli
Which three are benefits of A virtualized data center solution over A typical implementation?（）A、simplified cablingB、more efficient routingC、fewer applications per serverD、more efficient power consumptionE、more control over each serverF、less rack space
Which four statements about NetFlow are true？（）A、NetFlow records bidirectional IP traffic flow.B、NetFlow export can be implemented over IPv4.C、NetFlow export can be implemented over IPv6.D、NetFlow records multicast IP traffic flow.E、NetFlow records ingress traffic.F、NetFlow records egress traffic.
Click the Exhibit button.Which two are correct about CIFS acceleration based on the exhibit?（） (Choose two.)A、The statistics show savings for all CIFS traffic.B、The traffic transfered over 4,000 seconds faster.C、There was a bandwidth savings of almost 68.9%.D、The acceleration is only working for 68.9% of the traffic
Using a bitmap structure to manage database object space has several benefits over using freelist structures. Which three are benefits of managing space using automatic-segment-space managed objects？（）A、It readily responds to dynamic changes for concurrent access. B、It improves performance and space utilization in a multiple-instance environment. C、It requires fewer space related options then freelist managed structures. D、It improves performance for SYSTEM tablespaces where a high degree of concurrency is required.
You find pockets of empty space in the USER_DATA tablespace due to a lot of DML operations on the objects in the USER_DATAtablespace. The pockets of empty spaces are too small to be reused individually. This is leading to wastage of space. You decide to perform the shrink operation to reclaim the wasted space. Which advisor will you use to determine the objects in the USER_DATA tablespace that are good candidates for the shrink operation？（）A、 SQL Tuning AdvisorB、 SQL Access AdvisorC、 Undo AdvisorD、 Segment Advisor
问答题Practice 12 ● You work in a company which deals with industrial waste. You have read about a new kind of pump which could save your company thousands of dollars in servicing and maintenance costs. ● Write a memo of 30—40 words to your Head of Department saying: ● where you read about the new pump, ● why you think it could be a good investment, ● how you might get more information about it.
多选题Using a bitmap structure to manage database object space has several benefits over using freelist structures. Which three are benefits of managing space using automatic-segment-space managed objects？（）AIt readily responds to dynamic changes for concurrent access.BIt improves performance and space utilization in a multiple-instance environment.CIt requires fewer space related options then freelist managed structures.DIt improves performance for SYSTEM tablespaces where a high degree of concurrency is required.
多选题Click the Exhibit button.Which two are correct about CIFS acceleration based on the exhibit?（） (Choose two.)AThe statistics show savings for all CIFS traffic.BThe traffic transfered over 4,000 seconds faster.CThere was a bandwidth savings of almost 68.9%.DThe acceleration is only working for 68.9% of the traffic
多选题You use the segment advisor to help determine objects for which space may be reclaimed. Which three statements are true about the advisor given by the segment advisor?（）AIt may advise the use of online table redefinition for tables in dictionary managed tablespace.BIt may advise the use of segment shrink for tables in dictionary managed tablespaces it the no chained rows.CIt may advise the use of online table redefinition for tables in locally managed tablespacesDIt will detect and advise about chained rows.EIt may advise the use of segment shrink for free list managed tables.
多选题Which three are benefits of A virtualized data center solution over A typical implementation?（）Asimplified cablingBmore efficient routingCfewer applications per serverDmore efficient power consumptionEmore control over each serverFless rack space
多选题Which two are true？（）AA finalizer may NOT be invoked explicitly.BThe finalize method declared in class Object takes no action.Csuper.finalize（）is called implicitly by any over riding finalize method.DThe finalize method for a given objec twill be called no more than once by the garbage collector.EThe order in which finalize will be called on two objects is based on the order in which the two objects became finalizable.
单选题You find pockets of empty space in the USER_DATA tablespace due to a lot of DML operations on the objects in the USER_DATAtablespace. The pockets of empty spaces are too small to be reused individually. This is leading to wastage of space. You decide to perform the shrink operation to reclaim the wasted space. Which advisor will you use to determine the objects in the USER_DATA tablespace that are good candidates for the shrink operation？（）A SQL Tuning AdvisorB SQL Access AdvisorC Undo AdvisorD Segment Advisor
单选题When carrying a cargo of asphalt or molten sulfur，which are carried at temperatures of over 300°F，one of the biggest dangers is（）.Awater in the tanks or pipelinesBhaving the cargo too coolCexplosion of vapors after dischargeDinadequate ullage space
问答题We walked for many hours through the thick forests and over the rocky hills until we had reached the clearing A Bin which we would pitch our tent for the night. No error C D E
单选题A network technician is concerned about the environmental effects of power consumption and heat from network resources Limited space is also a concern. Which of the following technologies should be implemented?（）ACircuit switchingBNetwork address translationCPower over EthernetDVirtual servers