集装箱______装卸机械系统主要实现船岸交接，对停靠的集装箱船舶进行装卸作业。
参考答案：
解析：船
I________ along the street looking for a place to park when the accident________ . [ ]
A. went; was occurring
B. went; was occurred
C. was going; occurred
D. was going; had occurred
妇女在老年期的生理特点是生殖系统（）萎缩。
A.部分器官
B.全部器官
C.多数器官
