在长度为n的线性表中查找一个表中不存在的元素，需要的比较次数为 (47) 。A)

根据句意及所给单词的首字母提示填空。

1. Sometimes our feelings a _____ by our tone of voice.

2. In China, nodding one's head is g _____ meant to show agreement " yes"．

3. If you b _____ your finger to a Japanese waiter, he will be angry.

4. Talking loudly in public is i _____.

5. In some Asian countries s_____ the head means "agreement"．

6. People now c_____ over long distances by means of telephone, telegraph, radio, television and e-mail

    as well.

7. The g _____ people  use  for " yes" and "no" are  different  around the world.

8. As we all know, love and hate are opposite e _____ .

9. Putting your hands in your pockets is a sign of  d _____.

10. You must not t _____ the head of another person.

患儿，女，1岁，生后3个月起青紫渐加重，活动后气急，查体：生长发育明显落后，口唇、鼻尖、耳垂、指趾青紫明显，伴杵状指(趾)，胸骨左缘闻及Ⅲ级收缩期杂音，肺动脉第二音减弱。

患儿第二天晨起吃奶出现阵发性呼吸困难、烦躁和青紫加重，出现昏厥，其原因是

A．脑膜炎

B．脑栓塞

C．脑脓肿

D．心力衰竭

E．肺动脉漏斗部处肌肉痉挛

无论肾结石是否透光，诊断价值最大的检查方法应为（）

A.IVP

B.腹部平片

C.B超

D.螺旋CT

E.MRU

驾驶人在实习期内驾驶机动车时，应当在车身后部粘贴或者悬挂统一式样的实习标志。

组合开关主要用于电源的引入，当用于7kW以下电动机的起动、停止时，其额定电流应等于电动机额定电流的( )倍。

A．1.2

B．2

C．3

D．4