植物有性生殖中个体发育的起点是[ ]
A．精子
B．卵细胞
C．受精卵
D．种子
答案：C
-Have you seen the film?
--Yes. I _______ it three times when I was in Tokyo.
A．saw
B．had seen
C．have seen
D．was seeing
桥隧限界检查有什么规定？
