题目内容
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What does the cancellation of the 16-day flight mean？
A．The scientists on the ground are pursuing only their most important experiments.
B．The shuttle team will be disappointed at the curtailment of the science mission.
C．The science will complete the experiments on a later shuttle flight.
D．The remaining generators are sufficient.
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更多“What does the cancellation of …”相关的问题
A、intimate distance
B、personal distance
C、public distance
D、social distance
A、Phosphorylation/Dephosphorylation
B、Adenylation/Deadenylation
C、Methylation/Demethylation
D、Acetylation/Deacetylation
E、-SH / -S-S-
One of the difficulties in carrying out a worldwide birth control program lies in the fact that official attitudes to population growth vary from country to country depending on the level of industrial development and the availability of food and raw materials. In a developing country where a vastly expanded population is pressing hard upon the limits of food, space and natural resources, it will be the first concern of government to place a limit on the birthrate, whatever the consequences may be. In a highly industrialized society the problem may be more complex. A decreasing birthrate may lead to unemployment because it results in a declining market for manufactured goods. When the pressure of population on housing declines, prices also decline and the building industry is weakened. Faced with considerations such as these, the government of a developed country may well prefer to see a slowly increasing population, rather than one which is stable or in decline.
1. A large population may mean _________.
A.higher productivity, but a lower average income
B.ower productivity, but a higher average income
C.higher productivity and a higher average income
D.ower productivity and a lower average income
2.A large population may offer more scope for the development of _________.
A.economy
B.transportation
C.extensive cultivation
D.Agriculture
3.In highly industrialized countries, unemployment may result from _________.
A.a decreasing birthrate
B.an increasing birthrate
C.a stable birthrate
D.a birth control program
4.What may the government of a developed country prefer?（）
A.A rapidly increasing population.
B.A rapidly decreasing population.
C.A slowly increasing population.
D.A slowly decreasing population.
5.Why is it difficult to carry out a worldwide birth control program?（）
A.Because it will do harm to the national economy in most countries.
B.Because it will lead to complex social problems in developing countries.
C.Because people are unwilling to practice birth control.
D.Because different governments have different opinions.
A、More than double
B、More than treble
C、Less than double
D、Less than treble
| 阅读理解。 |
| Father's Day may be over in the United States, but animal dads are still hard at work. From penguins to catfish (鲶鱼), some animal-fathers play a big part in raising their babies. "Seahorses are possibly the best example of fathers caring for their young in the animal world," said Heather Mason Jones, a biologist at the University of Tampa in Florida. Human mothers carry their babies in their bodies for nine months. But seahorses are different. A female seahorse lays eggs and then puts them in a pouch on a male seahorse's belly (腹部), where the eggs stay until they hatch. Male seahorses aren't the only animal dads caring for eggs. The male hardhead catfish carries up to 48 marble-size eggs in his mouth for 60 days! He doesn't eat for the entire time. "You'd think it would be hard for them to give up a meal," said Ed Matheson, a fish expert at the Florida Marine Research Institute. Emperor penguins sit on eggs to hatch them during Antarctica's freezing winter. The males have to gather closely together for warmth and can lose half of their weight in the two months that it takes the baby penguins to hatch. Even mammal (哺乳动物) dads play a role in raising their young. The male South American marmoset (狨 猴) takes care of the baby in place of the mother a few weeks after she gives birth. So next Father's Day, remember the millions of dads hard at work in the animal kingdom! |
| 1. What purpose does the first paragraph serve in the passage？ |
| A. To provide background information. B. To tell readers an interesting fact. C. To bring in the topic interestingly. D. To offer basic knowledge for the text. |
| 2. How many kinds of animal dads does this text mention？ |
| A. One. B. Two. C. Three. D. Four. |
| 3. Which of the following statements is TRUE according to this text？ |
| A. The female hardhead catfish carries eggs in her mouth for 60 days. B. The male marmoset takes care of the baby as soon as the mother gives birth. C. The eggs stay in a pouch on a male seahorse's belly until they hatch. D. Emperor penguins sit on eggs to keep warm during the freezing winter. |
| 4. Who is the text mainly written for？ |
| A. Biologists. B. Fish experts. C. Ordinary readers. D. American fathers. |
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