如图，△ABC中，∠A=30°，∠C=90° AB的垂直平分线交AC于D点，交A

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问题选择题

如图，△ABC中，∠A=30°，∠C=90° AB的垂直平分线交AC于D点，交AB于E点，则下列结论错误的是（）

A.AD=DB
B.DE=DC
C.BC=AE
D.AD=BC

答案

答案：D

填空题

根据首字母和句子意思补全单词。

1. I should do my homework tonight i________ of watching TV.

2. He decided to go there, no one could s________ him.

3. Smoking is bad for our health, so we should make some posters a________ smoking.

4. He doesn't have much m________, he is very poor.

5. The giant tortoise lives longest of all animals, i________ humans.

单项选择题

下面各项中，不属于网络管理功能的是______.

A．配置管理

B．故障管理

C．网络规划

D．计费管理