皮皮学，免费搜题
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【多选题】
电子商务系统安全包括?A.
实体安全
B.
运行安全
C.
信息安全
D.
密钥管理安全
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
【单选题】听力原文：M: What subjects are you taking this semester? W: I'm taking History, ,Freshman Composition, Western Civilization and Physics. M: That's quite a load. W: Yes. I know it's going to be a lot of wor...
A.
She has earned enough money from the part-time job in summer.
B.
She has got enough money from her parents.
C.
She has saved a lot of money from her winter job.
D.
She has got a grant from her university.
【单选题】听力原文：M: How is school going, Barbara? Are you taking any new classes? W: I'm taking another really interesting course called Business and the Web. We are learning about e-commerce and how new technolo...
A.
E-commerce.
B.
Wireless communications.
C.
Business and the web.
D.
New technology.
【单选题】What can be inferred from the first paragraph?
A.
Taking a nap is useless for busy people.
B.
Taking a nap is viewed as something for curing disease.
C.
Taking a nap is regarded as lazy to work.
D.
Taking a nap can promote your work efficiency.
【单选题】听力原文：M: How is school going, Barbara? Are you taking any new classes? W: I'm taking another really interesting course called Business and the Web. We are learning about e-commerce and how new technolo...
A.
E-commerce.
B.
Wireless communications.
C.
Business and the web.
D.
New technology.
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