收发作业频繁的油罐（如加油站），使用（）对降低损耗无特殊意义。
A.罐车
B.地下油罐
C.地面油罐
D.油轮油舱
参考答案：B
大肠中最短的一段是
A．盲肠
B．直肠
C．升结肠
D．横结肠
E．降结肠
A. Sure. What is it B. It’s very nice of you to say so. C. It’s nothing. D. Have a nice trip! E. Certainly. Here you are.
A:I’m sorry to have kept you waiting for so long. B:______ I’ve been killing time by listening to music.
