There are ______ at the zoo.[ ]
A. animal
B. an animal
C. animals
答案:C
Does the hotel _________ a computer?[ ]
A. have
B. has
C. having
D. haves
关于替硝唑,下列说法正确的是()
A.为咪唑类衍生物
B.半衰期比甲硝唑长
C.可用于 * * 滴虫病
D.对阿米巴痢疾和肠外阿米巴病都有效
E.疗效与甲硝唑相当,但毒性稍低