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【单选题】
若有int num=7, sum=7;,则计算表达式sum=num++, sum++, ++num后sum的值为多少
A.
7
B.
8
C.
9
D.
10
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【单选题】IP报文头中固定长度部分为()字节
A.
为10
B.
为20
C.
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D.
为60
【判断题】水体自净作用是水体本身能消解一定量的污染物质,保持自身洁净的能力。
A.
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【单选题】γ-Fe的点阵常数为0.3633 nm,其密排面的晶面间距为( )
A.
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B.
0.2569
C.
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D.
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