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【多选题】
电弧对交流电路的影响包括( )
A.
电路电流存在零休现象。
B.
限流作用
C.
电流过零时的下降速度
D.
减小电路的功率因素
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【单选题】The 2018 World Cup __________ in Russia. How ________________ is !
A.
will be held ; exciting a news
B.
will taken place ; an exciting news
C.
will be taken place ; exciting the news
D.
will hold; an exciting news
【单选题】闪光对焊机周围()m内应无易燃易爆物品,并备有专用的消防灭火器材。
A.
3
B.
5
C.
10
D.
15
【单选题】用Samba共享了目录,但是在Windows网络邻居中却看不到它,应该在/etc/samba/ smb.conf中怎样设置才能正确工作?
A.
Allow WindowsClients=yes
B.
IHidden -no
C.
Browseableyes
D.
以上都不是
【单选题】When and where was the verdict announced about last World Cup Finals to be held both in Republic of Korea and Japan?
A.
At midday on June 2 in Zurich, Switzerland.
B.
At midday on June 1 in Zurich, Switzerland.
C.
At midday on June 1 in Geneva, Switzerland.
D.
At midday on June 2 in Geneva, Switzerland.
【单选题】已有定义int x=3,y=4,z=5;则表达式!(x+y)+z-1 && y+z/2的值是( )。
A.
2
B.
6
C.
0
D.
1
【判断题】按照故障的性质,网络故障可分为物理故障与逻辑故障两种。
A.
正确
B.
错误
【单选题】闪光对焊机周围( )内应无易燃易爆物品,并备有专用的消防灭火器材.
A.
3 m
B.
5 m
C.
10 m
D.
15 m
【单选题】_____ good news! The World Cup will be held in South Africa. [     ]
A.
What
B.
How
C.
What a
【单选题】用Samba共享了目录,但是在Windows网络邻居中却看不到它,应该在/etc/Samba/ smb.conf中怎样设置才能正确工作?
A.
AllowWindowsClients=yes
B.
Hidden=no
C.
Browseable=yes
D.
以上都不是
【单选题】The World Cup is held _________.
A.
once a year
B.
every two years
C.
every three years
D.
every four years
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