【单选题】【消耗次数：1】
The earth on[填空] we live is a planet.
①
which?
②
where
③
when
④
whose
参考答案：
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相关题目
【单选题】
____ from space, our earth, with water covering 70% of its surface, appears as a “blue planet”.
①
Seeing
②
To be seen
③
Seen
④
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【单选题】
____ we could not live at all.
①
If it was not for the sun
②
If it shouldn’t be for the sun
③
Were it not for the sun
④
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without that
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What does the falling intonation on the question “where do you live ?” indicate?
①
I am telling you something you do not know
②
I have not finished yet
③
I am asking a genuine question
④
I know you have told me before.
【单选题】
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①
/
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that
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【单选题】
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①
compares ?
②
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随机题目
【多选题】
下列表述正确的是（）
①
near表示检索词位置相邻，词的顺序不可以颠倒
②
*表示无限截词，代表0-n个字符
③
通配检索表示截词符出现在词的中间，代表1个字符
④
系统支持自动截词时不需要使用截词符号
⑤
截词符避免了文献的漏检，有效提高查全率
【多选题】
在CBM数据库检索中，下列（ ）可以提高查准率。
①
用主题词和副主题词组配检索
②
用OR进行逻辑运算检索
③
主题词检索时选择加权检索
④
选择智能检索
⑤
用AND进行逻辑运算检索