如图,在△ABC中,∠C=90°,DE⊥AB,AE平分∠BAC,CE=6,则ED

题型:选择题

问题:

如图,在△ABC中,∠C=90°,DE⊥AB,AE平分∠BAC,CE=6,则ED=(    )
A.8
B.7
C.6
D.5
考点:角平分线的性质
题型:选择题

阅读理解。

     Mr. Evans lived in a city. He was a bus driver in a company three years ago. He drove well and the

people in the company all liked him. But a terrible accident changed (改变) his life. One spring he drove

his bus with twenty-four workers to visit a place of interest. They had a good time there. But on their way

back home, their bus was hit by a truck (卡车) because the truck driver was drunk (醉). Four workers

were killed and half of the rest of the workers got badly injured. Mr. Evans was also injured. After he came

out of hospital, he left the company and became a traffic policeman. He tried his best to stop the drivers

from breaking the traffic riles. He worked hard and was strict with the drivers, especially the drivers that

were drunk. So they were afraid of him. But the people liked him, for he was a good policeman.

1. How did the accident happen? 

A. The truck hit the bus.

B. The bus hit the truck.

C. The bus hit a big tree.

2. How many people were injured in the accident?

A. Four.

B. Ten

C. Eleven.

3. What did Mr. Evans do after he left hospital?

A. He was a bus driver.

B. He was a policeman.

C. He was a truck driver.

题型:选择题

关于喉部CT检查,错误的是

A.从颈部向下扫描至甲状软骨下1cm
B.受检者需连续发字母“E”音
C.发音时,真声带呈舌状突入管腔内的皱襞,呼气时消失
D.观察声带,需使用高分辨力扫描
E.观察声带,调节窗宽1500~2000HU,窗位-450~-600HU

题型:选择题

DT862-4表示()

A.第一个字母“D”表示电力系统

B.第二个字母“T”表示三相四线

C.第三个字母“86”表示“86”系列电能表

D.“4”表示最大电流为标定电流的4倍

题型:选择题

牛尿比重的测定时,二份尿样温度分别是23℃和14℃,尿比重计显示的比重是1.025(比重计的标准温度是20℃),此时二份尿样的实际比重分别是( )。

A.1.026;1.023

B.1.028;1.023

C.1.027;1.025

D.1.023;1.028

E.1.025;1.028

题型:选择题

甲基橙指示剂变色范围为()。

A、3.1~4.4

B、4.4~6.2

C、8.0~10.0

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