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【单选题】
关于尺寸基准,以下说法正确的是( )。A.
机器零件在长、宽、高每个方向至少有一个尺寸基准
B.
设计基准和工艺基准有可能不重叠
C.
零件的底面、端面、对称面、主要轴线、中心线作为基准
D.
以上说法均正确
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【单选题】用EDTA连续滴定Fe3+,A13+时,可在( )。
A.
pH=2滴定Al³+，pH=4滴定Fe³+
B.
pH=1滴定Fe³+，pH=4滴定Al³+
C.
pH=2滴定Fe³+，pH=4返滴定Al³+
D.
pH=2滴定Fe³+，pH=4间接法测Al³+
【单选题】王国维在《人间词话》中说古今成大事者都必经历三种境界,其中“衣带渐宽终不悔,为伊消得人憔悴”取自( )
A.
晏殊的蝶恋花
B.
柳永的蝶恋花
C.
欧阳修的蝶恋花
D.
李清照的蝶恋花
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【简答题】On November 19, 2010, Harry Potter and the Deathly Hallows: Part I was released in many countries at the same time! This is another Harry Potter film. The idea for the book Harry Potter and the Philos...
【简答题】听下面一段材料，回答第1至3题。 1. What was the won doing last month? A. Se was taking care of her sick mother. B. She was writing a novel. C. She was taking care of her father while she was writing a novel. 2. How ...
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