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问题 单项选择题

变频器网侧交流侧有电抗器电流的5次谐波含量，Ih/I1为( )%。

A．38
B．30
C．28
D．14.5

答案

参考答案：A

解析： 《复习指导书(供配电)》14.4.4.3(2)表14-4-16。

填空题

根据句意和首字母提示，补全各小题单词。

1. If a Chinese lives in a f________ country, he or she is called an overseas Chinese.

2. Why didn't you do your homework? Students are s_________ to do their homework, you know.

3. I have been playing volleyball for hours. Now I'm so tired and t________. Could you get me some water?

4. It's not p________ to look around when you are speaking to others.

5. Most people agree that eating fruits and v_________ is good for health.

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单项选择题

提示：入院后出现左下肢肿胀疼痛。检查：左下肢肿胀明显。

最恰当的治疗是

A．静脉滴注抗生素

B．中西医结合治疗

C．中药清热解毒

D．抗生素+肾上腺皮质激素

E．抗生素+少量输血

F．大剂量抗生素+肝素
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