单选题The population of the earth（）increasing fast. One third of the population here（）workers.Ais;areBis;hasbeenCare;isDis;was
单选题
The population of the earth（）increasing fast. One third of the population here（）workers.
A
is;are
B
is;hasbeen
C
are;is
D
is;was
参考解析
解析：
暂无解析
相关考题：
The article suggests that______.A. our earth exists before the sunB. how space formedC. no one knows where the earth comes fromD. our earth used to be part of a high mountain on the sun
One day on the moon is _____.A. two Earth week longB. two Earth weeks longC. two Earth weeks longerD. two Earth weeks length
It is a common sense that the earth is ( ). A、one of the suns’ planetsB、one of the sun's planetsC、one of the sun’s planetD、one of the suns’ planet’s
Due to the increasing aging population in China, demand()the caregivers will continue to rise.A. withB. ofC. for
It has been proven that on the Earth, the closer one stays to the Earth, the more slowly time would seem to go.() 此题为判断题(对，错)。
I had worn out two pairs of boots on the walking tour , I needed a third one (疑问：此处的a third 能不能换成the third ）谢谢
Which of the following statements is NOT true?A) World population is increasing at a rate of 150 per minute.B) Lower death rates also contribute to world population growth.C) The population of Columbia has been doubling every year for 21 years.D) The United States is usually doubling its population about every 87 years.
The topic of the passage is that __.A.the control of population is essential to the development of a nationB.natural resources are important to the economic development of a countryC.awareness of the effects of man's actions is as important as population controlD. developed countries should do more to protect natural environment on the earth
In ship construction, keel scantlings should be the greatest ______.A.at each frameB.amidshipsC.one-third the distance from the bowD.one-third the distance from the stern
Passage 2If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.In the long run, the most difficult problem caused by population growth on earth will probably be the lack of__________.查看材料A．foodB．oilC．spaceD．resources
The world population is expected to rise to more than nine billion by 2050，one-third of all people______expected to live in cities。A.has beenB.areC.have beenD.have succeeded in
The population of the earth（）increasing fast. One third of the population here（）workers.Ais;areBis;hasbeenCare;isDis;was
The population of the earth（）increasing fast. One third of the population here（）workers.A、is;areB、is;hasbeenC、are;isD、is;was
问答题He tried one and experienced thewide-awakefeeling that one-third of the world's population now starts the day with.
单选题Priming of the tides occurs（）.Aat times of new and full MoonBwhen the Earth，Moon，and Sun are lying approximately on the same lineCwhen the Moon is between first quarter and full and between third quarter and newDwhen the Moon is between new and first quarter and between full and third quarter
问答题Pollution is a problem because man, in an increasingly populated and industrialized world, is upsetting the environment in which he lives. Many scientists maintain that one of man’s greatest errors has been to equate growth with advancement. Now “growth” industries are being looked on with suspicion in case their side effects damage the environment and disrupt the relationship of different forms of life. The growing population makes increasing demands on the world’s fixed supply of air, water and land. This rise in population is accompanied by the desire of more and more people for a better standard of living. Thus still greater demands for electricity, water and goods result in an ever increasing amount of waste material to be disposed of.The problem has been causing increasing concern to living things and their environment. Many believe that man is not solving these problems quickly enough and that his selfish pursuit of possessions takes him past the point of no return before be fully appreciates the damage.
单选题A radio link between a transmitting earth station and a receiving earth station through one satellite is named a（）.ARadio linkBSpace segmentCSatellite linkDupper link
问答题Pollution 1)Pollution is a problem because man, in an increasingly populated and industrialized world，is upsetting the environment in which he lives. 2) Many scientists maintain that one of man's greatest errors has been to equate growth with advancement. 3) Now “growth” industries are being looked on with suspicion incase their side effects damage the environment and disrupt the relationship of different forms of life. 4) The growing population makes increasing demands on the world’s fixed supply of air, water and land. 5) This rise in population is accompanied by the desire of more and more people for a better standard of living. 6) The problem has been causing increasing concern to living things and their environment.
填空题By increasing the levels of greenhouse gases in the atmosphere, human activities are strengthening Earth’s natural greenhouse effect.____
单选题—What ______ the population of China?—One third of population ______ workers here.Ais; areBare; areCis; isDare; is
单选题According to the writer, developed countries prefer ______.Aa standstill populationBa fast increasing populationCa slowly growing populationDa steadily decreasing population
单选题Geostationary satellites are the artificial satellites which（）.Aalways move slowlyBare in one place onlyCsometime move sometime don‟t moveDare synchronizing with the movement of the earth