There _____ no use to ask him this question.[ ]
A. were
B. is
C. are
D. was
答案:B
DNA分子可以分成许多片段,每一个片段具有特定的遗传信息,这些DNA分子的片段就叫做[ ]
A.DNA分子
B.蛋白质
C.染色体
D.基因
行政复议期间,申请人申请停止执行具体行政行为的,应该停止执行。()