在工程网络图中,M工作的最早开始时间为第8天,持续时间为3天,该工作有三项紧后工作,它们最早开始时间分别为第14天、15天、16天,则M工作的自由时差为( )天。
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对于不锈耐酸钢容器,试验用水的氯离子含量不应超过( )。
A. 10×10-6(上标)
B. 15×10-6(上标)
C. 25×10-6(上标)
D. 30×10-6(上标)
From the text we can conclude that the author ______.
A. is supportive of both sides
B. favors the townsfolk's view
C. takes a detached attitude
D. is sympathetic
It can be inferred from Para 3 that ______.
A. the sightseers cannot visit the Castle and the Palace separately
B. the playgoers spend more money than the sightseers
C. the sightseers do more shopping than the playgoers
D. the playgoers go to no other places in town than the theater
FOB价格为( )。
A. 到岸价
B. 离岸价
C. 到岸价+途中保险和国外运杂费
D. 离岸价+途中保险费和国外运杂费