用来吸收燃气中CnHm的发烟硫酸中的SO3浓度为()。A.10%一20% B.30%

题型:单项选择题

问题:

用来吸收燃气中CnHm的发烟硫酸中的SO3浓度为()。

A.10%一20%

B.30%~40%

C.20%一30%

考点:燃气化验工燃气化验工题库
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21岁女性患者,2周前因右下6可复性牙髓炎来院做间接盖髓术,术后冷水敏感加重,叩诊(+),近日有自发痛,复诊时应如何处理()。

A.X线片检查

B.电活力测验

C.去暂充物,重新盖髓

D.牙髓治疗

E.不处理,继续观察

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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

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SPS协定强调,所有的食品卫生标准都应以()为基础。

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根据《工程建设项目施工招标投标办法》(国家八部委局第30号令),工程施工招标投标活动应当遵循的原则是( )。

A.公平、公正、公开、实事求是
B.公开、公平、公正、诚实信用
C.公平、公正、科学、择优
D.公平、公正、公开、科学、择优

题型:单项选择题

交流输电线路的自然功率与()成正比。

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