问题 填空题

如图是测大气压值的实验,那么最早测出大气压数值的科学家是______.不同高度的大气压不一样,它随高度的增加而______(填“增大”或“减小”).

答案

最早测出大气压值的科学家是托里拆利,后来用他的名字命名了这一著名的实验;

大压强随高度的增加而减小,这是因为越往高处空气密度越小的缘故.

故答案为:托里拆利,减小.

单项选择题
阅读理解

阅读理解。

     We have met the enemy and he is ours. We bought him at a pet shop. When monkey-pox, a disease usually

found in the African rain forest suddenly turns up in children in the American Midwest, it's hard not to wonder

of the disease that comes from foreign animals is homing in on human beings. "Most of the infections (感染)

we think of as human infections started in other animals" says Stephen Morse, director of the Center for Public

Health Preparedness at Columbia University.

     It's not just that we're going to where the animals are; we're also bringing them closer to us Popular foreign

pets have brought a whole new disease to this country. A strange illness killed Isaksen's pets and she now thinks

that keeping foreign pets is a bad idea. "I don't think it's fair to have them as pets when we have such a limited

knowledge of them" says Isaksen.

     "Laws allowing these animals to be brought in from deep forest areas without stricter control need changing"

says Peter Schantz. Monkey-pox may be the wake-up call Researchers believe infected animals may infect their

owners. We know very little about these new diseases. Anew bug (病毒) may be kind at first But it may develop

into something harmful (有害的). Monkey-pox doesn't look a major infectious disease. But is not impossible to

pass the disease from person to person.

1. We learn from Paragraph I that the per sold at the shop may _____.

A. come from Columbia

B. prevent us from being infected

C. enjoy being with children

D. suffer from monkey-pox

2. Why did Isaksen advise people not to have foreign pets?

A. They attack human beings

B. We need to study native animals

C. They can't live out of the rain forest

D. We do not know much about them yet

3. What does she phrase "the wake-up call" in paragraph 3 most probably mean?

A. a new disease

B. a clear warning

C. a dangerous animal

D. a morning call

4. The text suggests that in the future we _____.

A. may have to fight against more new diseases

B. may easily get infected by diseases from dogs

C. should not be allowed to have pets

D. should stop buying pests from Africa