皮皮学，免费搜题
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【单选题】
What can a 'malignant' virus do to your computer?A.
It can cause no damages at all.
B.
It can cause damages to the computer systems.
C.
It can copy your files in computers.
D.
It can format your hard drive.
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参考解析：
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皮皮学刷刷变学霸
举一反三
【简答题】—
Was Tom there when you arrived? — Yes. But he ________ home soon
afterwards.A. had gone B. has gone C. is going D. went
【单选题】已知电对（Cl2/Cl-）的标准电极电势为+1.36V，在下列电极反应中标准电极电势为+1.36V 的电极反应是
A.
Cl2 + 2e- = 2Cl -
B.
2Cl2 + 4e- = 4Cl
C.
都是
D.
1/2Cl2 + e- = Cl
【单选题】--Was Tom there when you arrived? --Yes, but he___________ home soon afterwards.
A.
had gone
B.
has gone
C.
is
D.
went
【简答题】是一种 I/O 专用处理机。
【单选题】— Was Tom there when you arrived? — Yes. But he ________ home soon afterwards.
A.
had gone
B.
has gone
C.
is going
D.
went
【单选题】—Was Tom there when you arrived? —Yes, but he ______ home soon afterwards.
A.
had gone
B.
has gone
C.
is going
D.
went
【简答题】电解碱性 KCl 溶液可制备 KCIO 3 , 电极反应为 Cl - +6OH - →C l O 3 - + 3H 2 O + 6e 。通 电 10. 9 h 得到 10 g KCIO 3 , 试问电流效率为多少 ? 电解碱性 KCl 溶液可制备 KCIO 3 , 电极反应为 Cl - + 6OH - → C l O 3 - + 3H 2 O + 6e 。通 电 10. 9 h 得到 10 g K...
【单选题】100°C,101.3 kPa下,1 mol水与100°C热源接触,使它向真空容器中蒸发成 100°C, 101.3 kPa的水蒸气,可用来判断过程可逆性的是 。
A.
ΔH
B.
ΔA
C.
ΔG
D.
ΔS（总）
【单选题】100°C、101.3 kPa下, 1 mol水与 100°C热源接触,使它向真空容器中蒸发 成 100°C、101.3 kPa的水蒸气,此过程不正确的是 。
A.
△H > 0
B.
△U > 0
C.
△G > 0
D.
△S > 0。
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