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问题 单项选择题 A1/A2型题

疖病皮肤感染常见于（）

A.糖尿病病人

B.肝炎病人

C.胃癌病人

D.直肠癌病人

E.肺炎病人

答案

参考答案：A

解析：疖常见于免疫力较低的糖尿病病人及小儿。

填空题

用括号内所给动词的适当形式填空。

1. At first, the government had great difficulty in _____ (persuade) people to leave their hometown.

2. She suggested _____ (put) the meeting off, for we haven't got fully prepared for it.

3. _____ (compare) the heart to a pump, he helped the children to understand its function.

4. The green bicycle _____ (belong) to the postman. Don't take it away.

5. What he said was so ______ (confuse) that I was _____ (confuse) at his words.

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问答题 计算题

一单相桥式整流电路输入交流电压为220V，问输出直流电压是多少（无滤波）？
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