关于病例对照研究，下列哪项是正确的A．从不产生偏倚 B．是检验病因假说的研究方法 C

发布时间：2023-07-09 03:59 │ 来源：www.tikuol.com

题型：多项选择题

问题：

关于病例对照研究，下列哪项是正确的

A．从不产生偏倚

B．是检验病因假说的研究方法

C．前瞻性地获取暴露信息

D．在研究引起某一疾病的多种可能原因时，特别有用

E．在研究较为罕见的病例时，也特别有用

考点：药学职称考试药师专业实践能力药物流行病学

题型：多项选择题

已知集合A={x|x>0}，B={x|-1≤x≤2}，则A∪B=[ ]

A.{x|x≥-1}

B.{x|x≤2}

C.{x|0＜x≤2}

D.{x|1≤x≤2}

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题型：多项选择题

阅读理解

          New rules and behavior standards (行为规范) for middle school students came out in March. Middle
school is going to use a new way to decide who the top students are. The best students won't only have high
marks. They will also be kids who don't dye (染) their hair, smoke or drink. The following are some of the new
rules.
         Tell the truth. Have you ever copied someone else's work on an exam? Don't do it again! That is not
something an honest student should do. If you have played computer games for two hours in your room, don't
tell your parents you have done homework.
         Do more at school. Good students love animals and care for other people. April is Bird-Loving Month in
our country. Is your school doing anything to celebrate? You should join! That way, you can learn more about
animals and how to protect them. When more people work together, it makes it more fun for everyone. Have
you ever quarreled with your teammates when your basketball team lost? Only working together can make your
team stronger. Be friendly to the people around you. Try to think of others, not only yourself.
         Be open to new ideas. Have you ever thought that people could live on the moon? Perhaps you'll discover
Earth Ⅱsomeday. Don't look down on new ideas. Everyone's ideas are important. You should welcome them,
because new ideas make lire better for everyone.
          Protect yourself. Has someone ever taken money from one of your classmates? Don't let it happen to
you. If you have to go home late, you should let your parents know.
          Use the Internet carefully. The Internet can be very useful for your studies. But some things on the
Internet aren't for kids, so try to look at Web pages that are good for you. You can use the Web for fun or
homework. Can't you find any good Web sites for children? Here are some:
http:∥kids.eastday.corn      http:∥www.chinakids.net.cn      http:∥www.cycnet.corn

1．The school new rules will help kids by telling them__________ .

[ ]

A．how they can study well
B．what they should do only at school
C．what is right and what is wrong
D．how they can protect themselves

2．According to the passage,which of the following is NOT true?

[ ]

A．Take care of yourself when you are out.
B．Tell the truth,even when you are wrong.
C．Keep some animals to protect them.
D．Use the Internet,but keep away from bad things.

3．Good Web sites for children can_________ .

[ ]

A．be a waste of time
B．help them with their studies
C．do homework for them
D．make life easier

4. What does the passage tell us?

[ ]

A．How to be top students.
B．How to do more at school.
C．How to care for others.
D．How to use the Internet.

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题型：多项选择题

在监理工作实施过程中，如( )时，总监理工程师应及时召集专业监理工程师对监理规划进行修订，并按原程序报建设单位。

A．设计方案重大修改

B．承包方式发生变化

C．建设单位的出资方式发生变化

D．工期和质量要求发生重大变化

E．工程进度慢

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美国制造原子弹计划中，开始只想制造铀弹，后来研究发现钚239也可以发生链式反应，因此1945年美国制成的三颗原子弹：一颗铀弹，两颗钚弹，每颗爆炸力相当于2万吨黄色炸药TNT，请问真正用于实战的两颗原子弹分别投掷到哪里了（）

A.日本广岛和长崎

B.日本广岛和小仓

C.日本东京和京都

D.日本大阪和长崎

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题型：多项选择题

网点负责人是贵宾理财中心各项业务组织、经营、管理和（）的具体实施者。

A.监督

B.协调

C.指导

D.授权

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