问题 单项选择题

在静息或一般体力活动情况下,不能有效地将静脉回流的血液等量搏出引起心力衰竭,主要是由于

A.心肌收缩力减弱
B.心腔扩张
C.心肌收缩速度减慢
D.心室肌缺血缺氧
E.心房肌缺血缺氧

答案

参考答案:D

阅读理解

阅读理解。

                                                                   Happy New Years!

     Today is March 17th. About two and a half months ago, I said "Happy New Year!" to many of my friends.

About fifty days ago, I said the same thing to some other friends. In about four days, I'll say the same wishes

to yet another group of friends. I'll do the same thing in July and also in September. "How can that be?" you

might ask (if you 're from Western Europe or the Americas). "Everyone knows that New Year's Day is in

January!"

     In fact, the date of New Year's Day depends on the calendar (日历)-and I have friends who use one or

more of five different calendars to keep track of at least part of their lives:

●January 1st: New Year's Day on the Western/international calendar

●In January or February (in 2006, January 29th): New Year's Day on the Chinese calendar (China, Korea, and

a few other places)

●March 21st: New Year's Day on the traditional Persian (波斯)calendar

●Mid-July (usually the 16th): New Year's Day on the Islamic (穆斯林) calendar

●September: New Year's Day on most Eastern Orthodox Church (东正教) calendars (Central and Eastern

Europe) and, usually, on the Jewish calendar.

     And these are just the New Year's Days that I know about! As a matter of fact, there are probably even

more!

1. The first time the writer said, "Happy New Year!" was about January 1st. The second time was on or

    after _____.

A. February 28th

B. the middle of March

C. January 29th

D. March 21st

2. The writer will say "Happy New Year" around March 21st to some friends.

A. Chinese

B. Korean

C. Persian

D. Eastern Orthodox

3. According to the passage, we can infer that the exact (准确的) dates for the two New Year's Days in

    September are _____.

A. probably different

B. not always in September

C. probably the same

D. after September

4. The meaning of "keep track of" is _____.

A. understand

B. choose

C. manage

D. forget

5. The Chinese calendar is used _____.

A. only in China B. in several different places

C. only in China and Korea

D. all over the world

6. The word "Years" in the title of this article _____.

A. means that January 1st is at different times on different calendars

B. is a mistake and should be "Year"

C. is used because New Year's Day is at different times on different calendars

D. means that the writer was polite

单项选择题