胡麻、蚕豆、石榴、大蒜、葡萄、苜蓿等都是在商贸交流中经（）传入中原大地。
A、沿海
B、西域
C、西藏
参考答案：B
排水量为2×103t的轮船，装满货物后，在海水中受到的浮力是多大？在长江里航行时排开水的体积是多少m3？
— OK, I've had enough of it. I give up.
— You can't _______your responsibilities. [ ]
A. run off with
B. run up against
C. run out of
D. run away from
