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【单选题】
若一级冰醋酸含水量为0.2%,相对密度为1.05,则除去1000 ml冰醋酸中的水相对密度1.08,含量为97.0%的醋酐的体积为( )ml。A.
9 ml
B.
10 ml
C.
11 ml
D.
12 ml
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【单选题】Stephanopoulos pointed out that the number of today’s natural disasters is about ______ times more than that of the 1960s.
A.
2
B.
3
C.
4
D.
5
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【简答题】The desire to use language as a sign of national identity is a very natural one, and in result language has played a 【B1】 ______ prominent part in national moves. Men have often felt the 【B2】 ______ n...
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