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【多选题】
电子商务能够对企业竞争优势产生较明显的作用，主要包括（）A.
确保交易的安全性
B.
提高企业的管理水平
C.
扩大企业的市场范围
D.
节约企业的经营成本
E.
加速企业产品的创新
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反馈参考答案：
举一反三
【简答题】给手机sim卡加密的密码叫做______码,给电脑硬盘加密的方式叫做_______,两者可以在最坏的情况下给数据一份保障。(字母小写)
【单选题】After the rich man heard the touching story, he _____ most of his money to charity. [ ]
A.
gave in
B.
gave off
C.
gave away
D.
gave out
【单选题】After the rich man heard the touching story, he________ most of his money to charity.
A.
give in
B.
give off
C.
give away
D.
give out
【单选题】—Jack used to give most of his money to people in trouble. How do you like him? —Some thinks he might be kind of _______. But more people are grateful to him.
A.
silly
B.
unhappy
C.
afraid
D.
frustrating
【单选题】Most of the students ___ boys. Most of his money ___ spent on books.
A.
are; is
B.
is; is
C.
are; are
D.
is; are
【单选题】He likes reading very much．Most of his money on books．
A.
is spent
B.
spend
C.
spends
D.
are spent
【单选题】He left most of his money to his sons; his daughter only received a ______ share of his wealth.
A.
major
B.
many
C.
much
D.
minor
【简答题】支持交易中的电子商务系统的技术特点是什么?
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