问题 单项选择题 A1/A2型题

大气道阻塞时()

A.呼气费力

B.呼气时伴有广泛哮鸣音

C.常伴有湿啰音

D.常见于支气管哮喘

E.重者出现吸气时"三凹征"

答案

参考答案:E

解析:大气道阻塞表现为吸气性呼吸困难,可闻及局限性哮鸣音;小儿气管异物致大气道阻塞可闻及鸡鸣音,一般无湿性啰音,严重的吸气性呼吸困难则可表现出"三凹征"。

阅读理解

阅读理解。

Dear friend

     As the anniversary of your membership approaches, I'd like to express a heartfelt "Thank you" from

everyone here at the National Geographic Society for your valuable support. We appreciate having you

as a member, which is why we're asking you for help.

     One of the Society's long-standing goals is to keep membership costs as low as possible. To do this,

we ask members to post their fees early. This keeps renewal (续订) printing and postage costs down

(you save the expense of sending renewal reminders to you repeatedly and help us save paper) and allows

us to pass the savings on to you.

     Member's cooperation is why we can afford to send you 12 colorful issues of NATIONAL GEOGRAPHIC

magazine at such a low price. As you know, this rate is extraordinarily low for an award-winning publication

filled from cover to cover with full-color photographs, pictures and wall maps created by our world-famous

photographers.

     Plus, your fee helps enrich the world. Part of the payment I hope that you will send today helps support

the Society's research, exploration, and educational projects around the globe. In the past ten years alone,

your Society has helped sponsor more than 2, 700 scientific and environmental researches.

     And, of course, posting your fee now guarantees that you won't miss a single issue of NATIONAL

GEOGRAPHIC magazine. I hope that you'll commit yourself again to the pleasure that membership brings.

Thank you in advance for your early renewal. I' m looking forward to hearing from you. John Griffin President,

Publishing Department

1. The underlined word "disregard" probably means "_____".

A. ignore

B. consider

C. recognize

D. include

2. According to the Society, why is it cheaper to renew for two years?

A. The Society is a nonprofit organization.

B. The Society highly appreciates readers' support.

C. The discount is offered for readers' contribution.

D. It can save the money for renewal reminders and papers.

3. This letter is intended to _____.

A. introduce an award-winning magazine

B. instruct readers how to make payment

C. persuade readers to renew membership

D. explain the benefits of an early renewal

单项选择题