问题 单项选择题

炭素生制品焙烧的升温曲线制定,直接关系到产品的产量和质量,根据生制品的组成和性质制定焙烧线时,应该考虑当()的温曲线。

A.生制品的体积密度大,应制定升温速度要慢些

B.生制品骨料粒度小,应制定升温速度可以慢一些

C.生制品骨料粒度大,应制定升温速度可以快一些

D.生制品粘结剂用量偏小,应制定升温速度可以快些

答案

参考答案:A

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

多项选择题