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问题 选择题

I get up ______  go to school in the morning. [ ]

A. with

B. but

C. so

D. and

答案

答案：D

填空题

相距L的两个点电荷A、B分别带的电荷量为+9Q和－Q，放在光滑绝缘的水平面上，现引入第三个点电荷C，使三者在库仑力作用下都处于静止状态，问C所带的电荷量_______________， C应放在距离B 等于_______________位置上。

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单项选择题

Spyware and other forms of malware are the biggest online threat to your computer’s (71) nowadays. There malicious (72) which get to your PC through freeware, shareware, commercial sites, deceptive pop-ups or in any other way, can record your surfing habits and sites you visit, share your personal information with their partners. Any personal (73) , when in wrong hands, can leave you a victim of an "identity theft" by steeling your credit (74) details, birth records and other (75) information.

A．public

B．confidential

C．open

D．commercial
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