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【单选题】
You share your portable computer with a co-worker. You use separate user accounts to log on. A wireless network is available to you and your co-worker. You need to prevent your co-worker from modifying your wireless network profile. What should you do？（）A.
Disable the Connect even if the network is not broadcasting option.
B.
In the Network and Sharing Center window， click the Diagnose and repair option.
C.
Set the default wireless profile type to the Use all-users only profile （recommended） option. Recreate the wireless network.
D.
Set the default wireless profile type to the Use all-users and per-user profiles option. Recreate the wireless network by using the Save this network for me only option.
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【单选题】已知某放大电路由放大倍数完全相同的两个单级放大电路组成,那么,在组成它的单级放大电路的截止频率处,电路的放大倍数下降了
A.
3dB
B.
6dB
C.
8dB
D.
10dB
【简答题】“May I go and play with Dick this afternoon, Mum?” “No, you can’t go out _______ your work is being done.” A．before B．until C．as D．the moment
【单选题】Being out of work， Jane can no longer __________ friends to dinners and movies as she used to．
A.
urge
B.
treat
C.
appeal
D.
compel
【单选题】关于便携式氧气瓶的检查要求,下列说法错误的是( )。
A.
在位、数量要正确
B.
可以不用有独立包装的适配氧气面罩
C.
阀门在关断位
D.
压力表指针超过1500磅力
【单选题】__________ wrong data, he failed to work out the problem.
A.
To be given
B.
Being given
C.
Have given
D.
Having been given
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