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
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。
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.
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)?