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【判断题】
A: May I know who’s calling? B: Yes, you can. Im Xiaoyan.

① 正确
② 错误
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【简答题】
(a, b)[a, b] = [填空].

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【判断题】
Anyone is likely to commit mistakes, no matter however careful he is.

① 正确
② 错误
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【单选题】
Not until the early years of the 19th century ____ what heat is.

① man knew
② did man know
③ man did know
④ didn’t man know
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【单选题】
If we work with a strong will, we can overcome any difficulty, ____ great it is.

① what
② how
③ however
④ whatever
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【单选题】
It was in the school library ____ I came across John.

① that
② which
③ where
④ how
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【单选题】
The house __________ he used to live in is a library now.

① which
② where
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【简答题】
若a|b，则(a,b)=[填空].

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【单选题】
Endnote Library 数据库界面不包括（ ）

① 主菜单
② 快捷工具栏
③ 功能区
④ 编辑区
⑤ 书目信息显示窗口
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【单选题】
19.Our school library is ________ closed for repairs.

① shortly
② quickly
③ temporarily
④ rapidly
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