一个原始细胞到成熟细胞可经过 ()
A.1~2次分裂
B.2~3次分裂
C.3~4次分裂
D.4~5次分裂
E.5~6次分裂
参考答案:C
It's very strange that ______ the houses are, the more people want to buy them. [ ]
A. the most expensive
B. more expensive
C. the more expensive
D. much expensive
港口重大危险源安全评估满()的应当对港口重大危险源重新进行辨识分级。
A.一年
B.二年
B.三年
C四年