万用表能测量的物理量有()。
A.晶体管、电容器、长度
B.交流电流
C.长度、压力、电流
D.晶体管参数、音频
参考答案:D
—Who is the man over there? Is it Mr. Li?
—No, it _______ be him, Mr. Li has left for Hong Kong. [ ]
A. mustn't
B. may not
C. needn't
D. can't
患儿女,5岁,确诊水痘。抗病毒治疗首选药物为
A.肾上腺皮质激素B.阿司匹林C.阿昔洛韦D.利巴韦林E.阿米卡星