选择托盘需要考虑的因素有（）
A. 堆存货品的数量
B. 堆存货品的体积
C. 堆存货品的重量
D. 运输中，前后端客户使用的托盘类型
The passage contains ___ .
A. an important piece of informations
B. important informations
C. an important information
D. an important piece of information
___ not allowed to be put here.
A. Luggages are
B. Luggage is
C. No luggages is
D. The luggages are
Either Mary or John, who are twins, ___ left ___ coat.
A. have, their
B. have, his
C. has, his
D. has, their
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