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【单选题】
shell命令cp file /usr/men/tmp/file1的意思是?
A.
将文件/usr/men/tmp/file1复制一份
B.
将文件file复制一份到/usr/men/tmp/文件夹下，并将之命名为file1
C.
将文件file复制到/usr/men/tmp/file1文件夹下
D.
将文件file的内容复制到/usr/men/tmp/file1文件中，替换掉file1文件中原有的内容
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参考答案：
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【单选题】有H2和N2的混合气体50mL,加空气燃烧后,体积减少15mL,则H2在混合气体中的体积百分含量为( )。
A.
0.3
B.
0.2
C.
0.1
D.
0.45
查看完整题目与答案
【简答题】梁发生弯曲变形时横截面内力有( )和( )。
查看完整题目与答案
【判断题】含有 N 2 和 H 2 的混合气体中 N 2 的分 体积 V (N 2 ) = n (N 2 ) R T / p ( 总 ) 。
A.
正确
B.
错误
查看完整题目与答案
【简答题】I remember my maths teacher Mr Young very well. He stood out because the kids made fun of him. He was missing one of his fingers. In school Maths was my worst subject. I don’t think there was ever a d...
查看完整题目与答案
【简答题】My favorite physicist (物理学家) is Qian Xuesen. He was born in Shanghai on December 11, 1911. He was a little fat and of medium height. And his eyes were wise. He liked music, art and science (科学). He st...
查看完整题目与答案
【简答题】( )是世界最大最长的珊瑚礁群。
查看完整题目与答案
【单选题】有H2和N2的混合气体50mL，加空气燃烧后，体积减小15mL，则H2在混合气体中的体积百分含量为()。
A.
30%
B.
20%
C.
10%
D.
45%
查看完整题目与答案
【判断题】含有 N 2 和 H 2 的混合气体中, N 2 的分体积 V (N 2 )= n (N 2 ) RT / p ( 总 ) 。 ( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】Liu Kai is my classmate. He is a good student and always ready to help the others. One day on his way school, he saw a little girl crosses the road. A car was coming towards to her quickly and the gir...
查看完整题目与答案
【单选题】有H2和N2的混合气体50mL，加空气燃烧后，体积减少15mL，则H2在混合气体中的体积百分含量为（）。
A.
30%
B.
20%
C.
10%
D.
45%
查看完整题目与答案
相关题目：
【单选题】有H2和N2的混合气体50mL,加空气燃烧后,体积减少15mL,则H2在混合气体中的体积百分含量为( )。
A.
0.3
B.
0.2
C.
0.1
D.
0.45
查看完整题目与答案
【简答题】梁发生弯曲变形时横截面内力有( )和( )。
查看完整题目与答案
【判断题】含有 N 2 和 H 2 的混合气体中 N 2 的分 体积 V (N 2 ) = n (N 2 ) R T / p ( 总 ) 。
A.
正确
B.
错误
查看完整题目与答案
【简答题】I remember my maths teacher Mr Young very well. He stood out because the kids made fun of him. He was missing one of his fingers. In school Maths was my worst subject. I don’t think there was ever a d...
查看完整题目与答案
【简答题】My favorite physicist (物理学家) is Qian Xuesen. He was born in Shanghai on December 11, 1911. He was a little fat and of medium height. And his eyes were wise. He liked music, art and science (科学). He st...
查看完整题目与答案
【简答题】( )是世界最大最长的珊瑚礁群。
查看完整题目与答案
【单选题】有H2和N2的混合气体50mL，加空气燃烧后，体积减小15mL，则H2在混合气体中的体积百分含量为()。
A.
30%
B.
20%
C.
10%
D.
45%
查看完整题目与答案
【判断题】含有 N 2 和 H 2 的混合气体中, N 2 的分体积 V (N 2 )= n (N 2 ) RT / p ( 总 ) 。 ( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】Liu Kai is my classmate. He is a good student and always ready to help the others. One day on his way school, he saw a little girl crosses the road. A car was coming towards to her quickly and the gir...
查看完整题目与答案
【单选题】有H2和N2的混合气体50mL，加空气燃烧后，体积减少15mL，则H2在混合气体中的体积百分含量为（）。
A.
30%
B.
20%
C.
10%
D.
45%
查看完整题目与答案
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