单选题：So far Bill Gates has contributed several dozen billion dol

题目内容：

So far Bill Gates has contributed several dozen billion dollars to the charities. A．Right
B．Wrong
C．Not mentioned

参考答案：

答案解析：

He expressed concern that the ship might be in distress.

He expressed concern that the ship might be in distress.A．despair B．difficulty C

分类：卫生类题型：单选题

目前临床治疗血吸虫病的首选药是A．硝硫氰胺 B．吡喹酮 C．乙胺嗪 D．伊维菌素 E．酒石酸锑钾

分类：卫生类题型：单选题

He endured great pain before he finally expired.A．fired B．resigned C．died D．ret

分类：卫生类题型：单选题

对铜绿假单胞菌有较强作用的药物是A．氯唑西林 B．美西林 C．阿莫西林 D．哌拉西林 E．替莫西林

分类：卫生类题型：单选题

分类：卫生类题型：单选题