题目内容

Every chemical change either results from energy being used to produce the change, or causes the energy to ________ in some form.

A. give off
B. put out
C. set off
D. use up

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A mother is naturally()towards her children anyway.

A. acceptable
B. secure
C. protective
D. lovely

()the failure, he was determined to continue studying on the topic.

A. Because of
B. Despite
C. Though
D. Instead of

在网络安全中,中断指攻击者破坏网络系统资源,使之变成无效的或无用的。这是对_______。

A. 可用性的攻击
B. 保密性的攻击
C. 完整性的攻击
D. 真实性的攻击

You are so clear about it; somebody()you.

A. would tell
B. ought tell
C. must have told
D. should told

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