问题 单项选择题 B型题

第一心音特点()

A.音调低,强度弱,性质低钝,持续时间短,通常只在儿童和青、少年可听到

B.音调较低,强度较响,性质较钝,历时较长,与心尖搏动同时出现,心尖部听诊最清晰

C.音调较高,强度较第一心音低,性质较第一心音清脆,在心尖搏动之后出现,心底部听诊最清楚

D.低调、沉浊、很弱,心尖部及其内侧较明显

E.音调高、历时短促而响亮、清脆,呈拍击样,在心尖内侧较清楚

答案

参考答案:B

阅读理解

阅读理解。

     The 14-year-old Zhang Lei was riding home when a man suddenly jumped out from the roadside,

pulled him off his bike and rode to run off. Zhang was fairly scared, but he didn't run after the robber.

Instead, he found a telephone quickly and called the police at 110.    

     "Safety is the most important in such a situation, "Zhang said, remembering what his teacher had

told him in his first-aid class (急救课). "An adult is much stronger than you. It is not safe to run after

an adult."  

     Zhang is a student at Shenzhen Bao' an Middle School in Guangdong. His school is the first in China

to have first-aid education. The students at the school must take the class once a week.    

     Teenage safety has become a serious problem recently. According to a 2009 survey, about 16,000

teenagers die in all kinds of accident in China every year.

       Bao' an School said that the first-aid classes are to teach students skills so that they can save

themselves in unusual situations.    

Sun Yan, 12, described her favorite first-aid lesson."I performed as a stranger knocking at a door. A

classmate stood inside the door and asked several questions before letting me in. Then we changed roles

and did it again. "Sun said,"We learned a lot while having fun at role-playing."    

      "The teacher told us not to go out alone, especially at night. We would hit their eyes or noses if

someone tried to do bad things to us. Then  we should quickly run into a crowded place," said Wang

Ying, a 13-year-old girl.    

1. 判断正误(“T”表示正确,“F”表示错误)。

    ( )  It is not safe to run after an adult who is stronger than you. 

2. What happened to Zhang Lei that day?   

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3 .Where should we run if we met a bad person?

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4.  将文中画线句子译成汉语。

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5. What's the best title of the article? 

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单项选择题