— ______________ bike is it?
— It's his bike. [ ]
A. What
B. Who
C. Which
D. Whose
答案:D
一般不用于巴比妥类药物鉴别的金属盐是
A.钢盐
B.银盐
C.汞盐
D.钴盐
E.锌盐
WHO称()是严重威胁人类生命的20世纪瘟疫.
A.饮酒
B.吸烟
C.AIDS
D.细菌感染
E.病毒感染