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【多选题】
检索结果过多,调整方法有( )。A.
增加同义词,使用OR逻辑
B.
检查主题概念是否准确,采用专指度高的词或词组
C.
增加检索词,用AND组配或用位置配
D.
限制文献类型,缩短年限
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反馈参考答案：
举一反三
【简答题】平面四杆机构中,是否存在死点取决于 是否与连杆共线。
【单选题】听力原文：W: Did you talk to the consultant about the new program? M: No, he's at lunch until two. Q: What does the man mean? (15)
A.
He talked with the consultant until two.
B.
The consultant was leaving at two.
C.
The consultant wanted to talk to him, too.
D.
He couldn't talk to the consultant before two.
【单选题】听力原文：M: Did you talk with our new manager? He is looking for you these days. I think he has something important. W: I have been out of town for 2 days. And until this morning I come back. Q: What does...
A.
She hasn't talked with the new manager yet.
B.
The new manager was not in the office.
C.
She has been at home.
D.
She didn't want to talk with the new manager.
【单选题】— What did Paul say last night? — He said _________ listening to the radio program—“Teen Talk”.
A.
did he like
B.
that he liked
C.
if he likes
D.
what he liked
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