促进幼儿全面发展的首要条件是（）。 A.良好的智力品质 B.良好的道德素质 C.良好

关于分析性研究的叙述，下列哪项是错误的（）

A.队列研究中，相对危险度等于暴露组发病率除以对照组发病率

B.特异危险度等于暴露组死亡（发病）率减去非暴露组死亡（发病）率

C.病例对照研究中，可用比值比估计相对危险度

D.病例对照研究中，相对危险度等于病例组发病率除以对照组发病率

E.病例对照研究中，成组资料与匹配资料的效应测量值的计算公式不同

关于心悸不正确的是

A．有心悸则一定有心脏病

B．是自觉心脏跳动的不适感或心慌感

C．生理情况下也可出现心悸

D．自主神经功能紊乱可引起心悸

E．心动过速或心动过缓均可引起心悸

阅读理解

Dear Reader,

     Today I am going to ask you to support Wikipedia with a donation.

     Wikipedia is built differently from almost every other top 50 website.We have a small number of paid

staff,just twentythree.Wikipedia content is free to use by anyone for any purpose.Our annual expenses are less than six million dollars.Wikipedia is run by the nonprofit Wikimedia Foundation,which I founded in

2003.

     Wikipedia is driven by a global community of more than 150,000 volunteers-all devoted to sharing

knowledge freely.Over almost eight years,these volunteers  have  contributed  more  than 11 million articles in 265 languages.More than 275 million people come to our website every month to access information,

free of charge and free of advertising.

     But Wikipedia is more than a website.We share a common cause:Imagine a world in which every single person on the planet is given free access to the sum of all human knowledge.That's our commitment.

     Your donation helps us in several ways.Most importantly,you will help us cover the increasing cost of

managing global traffic to one of the most popular websites on the Internet.Funds also help us improve the software that runs Wikipedia-making it easier to search,easier to read,and easier to write for.We are

committed to increasing the free knowledge movement worldwide,by taking on new volunteers,and

building strategic partnerships with institutions of culture and learning.

     Wikipedia is different.It's the largest encyclopedia (百科全书)  in history,written by volunteers.Like a

national park or a school,we don't believe advertising should have a place in Wikipedia.We want to keep it free and strong,but we need the support of thousands of people like you.

                                                                                                                              Thank you,

                                                                                                                            Jimmy Wales

1. What do the second and third paragraphs mainly talk about?

A. Why you should donate to Wikipedia.

B. How much the workers are paid.

C. How Wikipedia is run.

D. How many people contribute to Wikipedia.

2. All the following are the reasons for the need of your donation EXCEPT________.

A. to keep Wikipedia free for people all over the world

B. to update the software that runs Wikipedia

C. to raise the salaries of the staff

D. to pay the cost of running the website

3. What does the underlined word "That" in Paragraph 4 refer to?

A. Free access to all human knowledge.

B. Human knowledge.

C. Every single person.

D. A common cause.

4. Which of the following is TRUE about Wikipedia?

A. It only has 23 workers at present.

B. It will run a national park or a school.

C. It has got much help from other people.

D. It may put some advertisements to earn money.

5. What's the author's purpose of writing this text?

A. To introduce the differences between Wikipedia and other websites.

B. To improve the software that runs Wikipedia.

C. To make Wikipedia more popular.

D. To call on people to donate to Wikipedia.

何谓中药的五味?试述其作用。

超短波通信的特点是（）。

A．工作频带宽

B．天线尺寸大

C．传输距离远

D．主要靠天波传播