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【单选题】
段落标记是表示文章中一个段落的结束,在输入文字时按()键会出现段落标记
A.
回车键
B.
功能键
C.
空格键
D.
上档键
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【判断题】一般位置直线在三个投影面上的投影都小于实长。
A.
正确
B.
错误
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【简答题】Yesterday the police were joined by more than 20 volunteers in the continuing search for the two missing agers, Vicky Gray and Tom Hunter, and their guide, Gavin Jones. The police said that they h...
【单选题】多数蛋白质的平均含氮量为———。
A.
50%
B.
6%
C.
16%
D.
20%
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【单选题】多数蛋白质的平均含氮量为
A.
0.5
B.
0.06
C.
0.16
D.
0.2
【单选题】一 般位置直线 于三个投影面。
A.
垂直
B.
倾斜
C.
平行
D.
包含
【单选题】多数蛋白质的平均含氮量为
A.
50%
B.
16 %
C.
20 %
D.
6 %
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