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【单选题】
在蜗杆传动机构中,蜗杆的 和轴向窜动径向跳动都将以线值误差形式传给蜗轮。而蜗轮的传动误差同斜齿圆柱齿轮相似。
A.
直径误差
B.
螺距误差
C.
半角误差
D.
中径误差
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【单选题】终止系统中所有stu用户的进程的命令是()
A.
pkill  stu
B.
pkill -u stu
C.
kill stu
D.
kill -u stu
【简答题】试写出下列二进制数的典型格雷码: 1、 101010 , 2、 10111011。
【单选题】Players of sport had to wait for new equipment, but big-time sport continued throughout the war.
A.
Y
B.
N
C.
NG
【简答题】Skin-diving(潜泳) is a new sport today. This sport take you into a wonderful new world. It is like a visit to the moon! When you are under water, it is easy for you to climb big rocks, because you are o...
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【单选题】广义电子商务是指利用 ( ) 进行的 各项 商业活动。
A.
电子签名技术
B.
法律手段
C.
数据电文
D.
法律手段和信息技术
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【单选题】终止系统中所有stu用户的进程的命令是()
A.
kill -u stu
B.
pkill  stu
C.
pkill -u stu
D.
kill stu
【单选题】After working hard for many years, .A.his dream was realizedB.his dream came trueC.he came true
A.
13. After working hard for many years, . A.his dream was realized
B.
his dream came true
C.
he came true his dream
D.
he realized his dream
【单选题】He seemed as if he ___ his homework when his mother came in.
A.
did
B.
is to be doing
C.
were doing
D.
be doing
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