单选题The photoperiodic response of algae actually depends on the duration of darkness, but not on the response of light.Ais not on lightBbut is not on the lightCand not on lightDthe light is not on
单选题
The photoperiodic response of algae actually depends on the duration of darkness, but not on the response of light.
A
is not on light
B
but is not on the light
C
and not on light
D
the light is not on
参考解析
解析：
结构应用。句意：事实上海藻的光周期反应取决于黑暗的持续时间，而不是光。可知前后为并列关系，英语中表并列关系用and，并且抽象名词和物质名词前不加冠词，因此正确答案为选项C。
结构应用。句意：事实上海藻的光周期反应取决于黑暗的持续时间，而不是光。可知前后为并列关系，英语中表并列关系用and，并且抽象名词和物质名词前不加冠词，因此正确答案为选项C。
相关考题：
Which of the following actions is an example of risk response:A adjust project parameters (scope, time, quality ...)B reduce the probability of potential project risk eventsC reduce the consequences of potential project risk eventsD wait until a problem actually happens, then deal with it in the most effective and efficient manner.E A, B and C only
23 Which of the following actions is an example of risk response:A. adjust project parameters (scope, time, quality ...)B. reduce the probability of potential project risk events C. reduce the consequences of potential project risk eventsD. wait until a problem actually happens, then deal with it in the most effective and efficient manner.E. A, B and C only
105 Which of the following actions is an example of risk response:A. adjust project parameters (scope, time, quality ...)B. reduce the probability of potential project risk eventsC. reduce the consequences of potential project risk eventsD. wait until a problem actually happens, then deal with it in the most effective and efficient manner.E. A, B and C only
ForagivenServletresponseresponse,whichtworetrieveanobjectforwritingtextdata?() A.response.getWriter（）B.response.getOutputStream（）C.response.getOutputWriter（）D.response.getWriter（）.getOutputStream（）E.response.getWriter（Writer.OUTPUT_TEXT（）
Youarecreatingaservletthatgeneratesstockmarketgraphs.Youwanttoprovidethewebbrowserwithpreciseinformationabouttheamountofdatabeingsentintheresponsestream.WhichtwoHttpServletResponsemethodswillyouusetoprovidethisinformation？（）A.response.setLength（numberOfBytes）；B.response.setContentLength（numberOfBytes）；C.response.setHeader（Length，numberOfBytes）；D.response.setIntHeader（Length，numberOfBytes）；E.response.setHeader（Content-Length，numberOfBytes）；F.response.setIntHeader（Content-Length，numberOfBytes）；
OntheCompanywirelessLAN,Aclientissearchingforanaccesspoint(AP).WhatisthecorrectprocessorderthatthisCompanyclientandaccesspointgoesthroughinordertocreateaconnection?() A.associationrequest/response，proberequest/response，authenticationrequest/responseB.associationrequest/response，authenticationrequest/response，proberequest/responseC.proberequest/response，authenticationrequest/response，associationrequest/responseD.proberequest/response，associationrequest/response，authenticationrequest/responseE.Noneoftheotheralternativesapply
Aclientissearchingforanaccesspoint(AP).Whatisthecorrectprocessorderthattheclientandaccesspointgothroughtocreateaconnection?() A.proberequest/response，authenticationrequest/response，associationrequest/responseB.associationrequest/response，authenticationrequest/response，proberequest/responseC.proberequest/response，associationrequest/response，authenticationrequest/responseD.associationrequest/response，proberequest/response，authenticationrequest/response
共用题干第一篇Putting Plants to WorkUsing the power of the sun is nothing new.People have had solar-powered calculators and buildings withsolar panels（太阳能电池板）for decades. But plants are the real experts. They' ve been using sunlight as anenergy source for billions of years.Cells in the green leaves of plants work like tiny factories to convert sunlight, carbon dioxide（二氧化 碳）,and water into sugarsand starche（淀粉）,stored energy that the piants can use. This conversion process is called photosynthesis (光合作用）Unfortunately, unless you' re a plant, it's difficult and expensive to convert sunlight into storable energy. That's why scientists are taking a closer look at exactly how plants do it.Some scientists are trying to get plants,or biological cells that act like plants, to work as very small photosynthesic power stations. For example, Maria Ghirardi of the National Renewable Energy Laboratory in Golden. Cobo.,is working with green algae（水藻）.She's trying to trick them into producing hydrogen instead of sugars when they perform photosynthesis. Once the researchers can get the algae working efficient- ly ,the hydrogen that they produce could be used to power fuel cells in cars or to generate electricity.The algae are grown in narrow-necked glass bottles to produce hydrogen in the lab. During photosynthe- sis , plants normally make sugars or strchds. "But under certain conditions,a lot of algae are able to use the sunlight energy not to store starch , but to make hydrogen."Ghirardi says. For example ,algae will produce hy-drogen in an airfree environment. It' s the oxygen in the air that prevents algae from making hydrogen most of the time.Working in an airfree environment, however, is difficult. It's not a practical way to produce cheap energy. But Ghirardi and her colleagues have discovered that by removing a chemical called sulfate（硫酸盐） from the environment that the algae grow in, they will make hydrogen instead of sugars,even when air is present.Unfortunately, removing the sulfate also makes the algae's cells work very slowly,and not much hydrogen is produced. Still ,the researchers see this as a first step in their goal to produce hydrogen efficiently from algae. With more work,they may be able to speed the cells' activity and produce larger quantities of hydrogen.The researchers hope that algae will one day be an easy-to-use fuel source. The organisms are cheap to get and to feed, Ghirardi says,and they can grow almost anywhere:"You can grow them in a reactor, in a pond. You can grow them in the ocean. There's a lot of flexibility in how you can use these organisms." Researchers find it difficult to make algae produce hydrogen efficiently because_______________.A:it is hard to create an airfree environmentB:it is expensive to remove the sulfate from the environmentC:removing the sulfate slows down hydrogen productionD:the algae's cells work slowly if there is no oxygen in the air
共用题干第一篇Putting Plants to WorkUsing the power of the sun is nothing new.People have had solar-powered calculators and buildings withsolar panels（太阳能电池板）for decades. But plants are the real experts. They' ve been using sunlight as anenergy source for billions of years.Cells in the green leaves of plants work like tiny factories to convert sunlight, carbon dioxide（二氧化 碳）,and water into sugarsand starche（淀粉）,stored energy that the piants can use. This conversion process is called photosynthesis (光合作用）Unfortunately, unless you' re a plant, it's difficult and expensive to convert sunlight into storable energy. That's why scientists are taking a closer look at exactly how plants do it.Some scientists are trying to get plants,or biological cells that act like plants, to work as very small photosynthesic power stations. For example, Maria Ghirardi of the National Renewable Energy Laboratory in Golden. Cobo.,is working with green algae（水藻）.She's trying to trick them into producing hydrogen instead of sugars when they perform photosynthesis. Once the researchers can get the algae working efficient- ly ,the hydrogen that they produce could be used to power fuel cells in cars or to generate electricity.The algae are grown in narrow-necked glass bottles to produce hydrogen in the lab. During photosynthe- sis , plants normally make sugars or strchds. "But under certain conditions,a lot of algae are able to use the sunlight energy not to store starch , but to make hydrogen."Ghirardi says. For example ,algae will produce hy-drogen in an airfree environment. It' s the oxygen in the air that prevents algae from making hydrogen most of the time.Working in an airfree environment, however, is difficult. It's not a practical way to produce cheap energy. But Ghirardi and her colleagues have discovered that by removing a chemical called sulfate（硫酸盐） from the environment that the algae grow in, they will make hydrogen instead of sugars,even when air is present.Unfortunately, removing the sulfate also makes the algae's cells work very slowly,and not much hydrogen is produced. Still ,the researchers see this as a first step in their goal to produce hydrogen efficiently from algae. With more work,they may be able to speed the cells' activity and produce larger quantities of hydrogen.The researchers hope that algae will one day be an easy-to-use fuel source. The organisms are cheap to get and to feed, Ghirardi says,and they can grow almost anywhere:"You can grow them in a reactor, in a pond. You can grow them in the ocean. There's a lot of flexibility in how you can use these organisms." Algae are able to use solar energy to produce hydrogen when_______________.A:they are grown in narrow-necked bottlesB:there is no oxygen in the airC:there is enough oxygen in the airD:enough starch is stored
For a given Servlet Response response， which retrieves an object for writing binary data？ （）A、 response.get writer （）B、 response.get Output Stream （）C、 response.getOutput Writer（）D、 response.get Writer （）.get Output Stream （）E、 response.get Writer （Writer.OUTPUT_BINARY）
For a given ServletResponse response，which two retrieve an object for writing text data？（）A、response.getWriter（）B、response.getOutputStream（）C、response.getOutputWriter（）D、response.getWriter（）.getOutputStream（）E、response.getWriter（Writer.OUTPUT_TEXT）
On the Company wireless LAN， A client is searching for an access point （AP）. What is the correct process order that this Company client and access point goes through in order to create a connection？（）A、 association request/response， probe request/response， authentication request/responseB、 association request/response， authentication request/response， probe request/responseC、 probe request/response， authentication request/response， association request/responseD、 probe request/response， association request/response， authentication request/responseE、 None of the other alternatives apply
A client is searching for an access point （AP）. What is the correct process order that the client and access point go through to create a connection？（）A、 probe request/response， authentication request/response， association request/responseB、 association request/response， authentication request/response， probe request/responseC、 probe request/response， association request/response， authentication request/responseD、 association request/response， probe request/response， authentication request/response
For a given ServletResponse response， which retrieves an object for writing binary data？（）A、 response.getWriter（）B、 response.getOutputStream（）C、 response.getOutputWriter（）D、 response.getWriter（）.getOutputSTream（）E、 response.getWriter（Writer.OUTPUT_BINARY）
For a given Servlet Response response， which two retrieve an object for writing text data？ （）A、 response.get Writer （）B、 response.get Output Stream （）C、 response.get Output Writer （）D、 response.get Writer （）.get Output Stream（）E、 response.get Writer （Writer.OUTPUT_TEXT）
单选题In what light does the passage depict the efforts by Fredric Wertham to bring about regulation of the comic book industry?AAs a fanatical crusade brought about by Wertham’s inner demonsBAs a witch-hunt roughly analogous to the concurrent anti-Communist hearings by the House Committee on Un-American ActivitiesCAs a reasonable response to an industry that had gone too farDAs an angry response to a trend in the subject matter of the comic book industryEAs an inappropriate response to a phenomenon that was not actually hurting anyone
单选题According to the passage, the algae ______.Amay not carry on photosynthesis aloneBsupply food to the fungiCcan’t live separatelyDaren’t recognizable as a species
单选题On the wireless LAN， A client is searching for an access point （AP）. What is the correct processorder that this client and access point goes through in order to create a connection？（）Aassociation request/response， probe request/response， authentication request/responseBassociation request/response， authentication request/response， probe request/responseCprobe request/response， authentication request/response， association request/responseDprobe request/response， association request/response， authentication request/responseENone of the other alternatives apply
单选题Researchers think that it is ______.Asafe to eat fresh fishBdangerous to get close to the algaeCsafe to be near the algaeDdangerous to expose the algae
单选题A client is searching for an access point （AP）. What is the correct process order that the client and access point go through to create a connection？（）A probe request/response， authentication request/response， association request/responseB association request/response， authentication request/response， probe request/responseC probe request/response， association request/response， authentication request/responseD association request/response， probe request/response， authentication request/response
单选题For a given ServletResponse response， which retrieves an object for writing binary data？（）A response.getWriter（）B response.getOutputStream（）C response.getOutputWriter（）D response.getWriter（）.getOutputSTream（）E response.getWriter（Writer.OUTPUT_BINARY）
单选题Which of the following can be inferred about the effect of direct sunlight on lichens?AIt damages the algae.BIt helps the fungi absorb water.CIt is required for the algae to carry on photosynthesis.DIt destroys the fungi.
单选题Algae vary in their capacity to tolerate salinity changes.Aindication Bability Ceffort Dintellect