为提高装卸效率,使用相同装卸属具的货物,可能条件下应()。
A.配装于底舱内
B.配装于二层舱内
C.配装于同一货舱相近位置
D.A和C均是
参考答案:C
Clean water and fresh air are essential for our daily life, _______ we can't live.[ ]
A. by which
B. without which
C. that
D. on which
1900 年,帝国主义国家组织( ),由天津向北京进犯。