测量聚合物固含量所用的称量瓶规格是()。
A.内径30mm,高40mm
B.内径40mm,高30mm
C.内径50mm,高20mm
D.内径60mm,高20mm
参考答案:B
5.The police are offering a $ 60,000 _____ for information about the killer.
A.price
B.prize
C.award
D.Reward
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