交界性早搏的心电图表现是（） A.有窦性P′波 B.QRS>0.12s C.代偿间期

患者男性，47岁，胸闷症状。心电图如图5-24所示，应诊断为（）

A.二度Ⅰ型窦房阻滞

B.二度Ⅰ型房室传导阻滞

C.二度Ⅱ型窦房阻滞

D.二度Ⅱ型房室传导阻滞

E.窦性心律不齐

为了测定额定电压为2.5V的小灯泡的额定功率，小明采用了如图所示的电路．

（1）甲、乙可能是电流表或者电压表，则甲表应是______．

（2）当闭合开关S后，发现灯泡两端的电压只有2V，为了使灯泡两端电压达到2.5V，则滑动变阻器滑片P应向______端移动．（选填“a”或“b”）

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.

症见肌肤不仁，关节疼痛重着等，多因外感下列哪种邪气（）

A.暑邪

B.寒邪

C.燥邪

D.湿邪

E.风邪