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【判断题】
光滑接触面约束的反为压力,通过接触点,方向沿着接触面的公法线指向被约束的物体。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】某二进制无符号数11101010，转换为3位非压缩BCD数，按百位、十位和个位的顺序表示应分别为(2)。
A.
00000001 00000011 00000111
B.
00000011 00000001 00000111
C.
00000010 00000011 00000100
D.
00000011 00000001 00001001
【单选题】某二进制无符号数11101010，转换为三位非压缩BCD数，按百位、十位和个位的顺序表示，应为(11)。
A.
00000001 00000011 00000111
B.
00000011 00000001 00000111
C.
00000010 00000011 00000100
D.
00000011 00000001 00001001
【单选题】两相不完全星形接线电流保护作Yd-11接线变压器保护时,应在保护的中性线上再接一个继电器,作用是为了提高保护的( )。
A.
选择性
B.
可靠性
C.
灵敏性
D.
快速性
【简答题】When the lost of money is reported to him, the security officer interviews all those people who_____ the opportunity to go into the sales office.A. might have had B. would have had C. will have had D....
【单选题】Whatdoes the security officer say about national and on campus emergency number?
A.
They are both 3333
B.
They are not the same
C.
They are both 999
【单选题】The security officer wondered _____ cell phone and car keys were left in the restroom.
A.
whose
B.
who's
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