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［A］ up ［B］ off ［C］ down ［D］ on
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Statistical cost estimating techniques (based upon history), are called _____ estimates and are a _____ approach.A . Definitive, bottom up.B . Analogy, top down.C . Parametric, bottom up.D . Parametric, top down.E . Analogy, bottom up.
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The two plants he had ever worked for have _______ due to foreign competition.
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(A) hold up(B) hold to(C) hold down(D) hold off
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The idea of becoming a writer had come to me _____ since my childhood in Belleville
A.off and onB.to and fromC.over and overD.up and down
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After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?"()
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On a laptop, special operations like wireless card on／off, volume settings, and screen brightness can generally be controlled via which of the following physical means?()
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键盘事件的执行顺序是（）。AKey Press、Key Down、Key UpBKey Down、Key Press、Key UpCKey Up、Key Down、Key PressDKey Up、Key Press、Key Down
考题
下面当主接口由up转为down后哪种说法正确？（）A、当主接口由up转为down后，立即切换到备份接口。B、当主接口由down转为up后，立即切换回主接口。C、当主接口由up转为down后，等待一定时间后，若主接口状态仍为down，才切换到备份接口。D、当主接口由down转为up后，等待一定时间后，若主接口状态仍为up，才切换回主接口。
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考题
On a laptop, special operations like wireless card on/off, volume settings, and screen brightness can generally be controlled via which of the following physical means?（）A、Docking station toggle switchesB、FN keysC、RemotesD、Up/down arrows
考题
单选题After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?"（）A
Layer 1 on the interface is up but Layer 2 is down.B
Layer 2 on the interface is up but Layer 3 has not been configured.C
The interface is administratively up but the link status is down.D
The interface is up but has been administratively turned off.
考题
多选题A user is reporting that a PC will suddenly shut down without warning. The PC boots up with no problems, but after using the PC for a short time, the PC turns off. Which of the following components should the technician check?（） (Select TWO).ACPU fanBRAMCHard driveDPower supplyEVideo card
考题
单选题键盘事件的执行顺序是（）。A
Key Press、Key Down、Key UpB
Key Down、Key Press、Key UpC
Key Up、Key Down、Key PressD
Key Up、Key Press、Key Down
考题
多选题下面当主接口由up转为down后哪种说法正确？（）A当主接口由up转为down后，立即切换到备份接口。B当主接口由down转为up后，立即切换回主接口。C当主接口由up转为down后，等待一定时间后，若主接口状态仍为down，才切换到备份接口。D当主接口由down转为up后，等待一定时间后，若主接口状态仍为up，才切换回主接口。
考题
单选题71 A take off B stand up C take up D stand byA
AB
BC
CD
D
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