预防小儿结核的有效措施是（）。
A.隔离患儿
B.普种卡介苗
C.药物预防
D.化疗预防
E.抗生素预防
参考答案：B
It's hard to get _____ work these days. It is said, however, that he has been offered _____ nice job in a
big company.[ ]
A. a; a
B. /; /
C. /; a
D. a; /
被囊动物
