国际货运中转产生的原因是()。
A.无直达航线或直挂船舶的港口
B.货物批量不支持大船停靠
C.干线与支线集疏
D.货主的特殊要求
参考答案:A, B, C, D
We shouldn't do _____ at the table through the whole day, and we need to do more _____ if we have
time to keep healthy. [ ]
A. exercise; exercises
B. exercises; exercises
C. exercise; exercise
D. exercises; exercise
机体不同组织被氮饱和所需的时间不同,被氮饱和最慢的组织是()
A.肌肉
B.腺体
C.脂肪
D.血液
E.脑灰质