【单选题】【消耗次数：1】
文献检索过程中，OR代表
①
检索包含所有关键字的数据
②
检索的数据中至少含有一个所给关键字，用于检索同义词或者词的不同表达方式
③
排除含有某一特定关键字的数据
④
以上都正确
⑤
以上都不正确
参考答案：
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相关题目
【单选题】
文献检索过程中，NOT代表
①
检索包含所有关键字的数据
②
检索的数据中至少含有一个所给关键字，用于检索同义词或者词的不同表达方式
③
排除含有某一特定关键字的数据
④
以上都正确
⑤
以上都不正确
【单选题】
文献检索过程中，AND代表
①
检索包含所有关键字的数据
②
检索的数据中至少含有一个所给关键字，用于检索同义词或者词的不同表达方式
③
排除含有某一特定关键字的数据
④
以上都正确
⑤
以上都不正确
【多选题】
UFO报表中，有关关键字叙述正确的是（??）。
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关键字偏移量单位为毫米
②
每个报表可以同时定义多个关键字
③
关键字的位置可以偏移量来表示
④
如果要取消关键字，须执行“数据”“关键字”“取消”命令
【单选题】
在PubMed数据库中检索有关色盲的文献，以下哪个检索式不正确？（）
①
color AND blind
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（color OR colour）AND blind
③
col?r AND blind
④
colour AND blind
随机题目
【单选题】
the old couple decided to ____ a boy and a girl though they had three of their own.
①
adapt
②
bring
③
receive
④
adopt
【单选题】
I will count three hundred and not one of you ______ move a bit.
①
is to
②
are to
③
is
④
are
【单选题】
After a lot of difficulties, he _______ to open the door.
①
managed
②
succeeded
③
accomplished
④
tried
【单选题】
None of us expected the chairman to _____ at the party. We thought he was still in hospital.
①
turn in
②
turn over
③
turn up
④
turn down
【单选题】
Thanks, you saved my daughter’s life!____________
①
Oh, I’m afraid I didn’t do well enough.
②
No problem.
③
I’m glad I could help.
④
It’s not necessary for you to say so.
【单选题】
All things ____, the planned trip will have to be called off.
①
considered
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be considered
③
considering
④
having considered
【单选题】
It is better for you to be _____ about its consequences before you take any action.
①
positive
②
absolute
③
critical
④
favorite
【单选题】
The new apartment built a few months ago is large enough to _____ over two hundred people.
①
contain
②
provide
③
reside
④
accommodate
【单选题】
Shall we sit up here on the grass or down there near the water?_________
①
I’d rather stay here if you don’t mind.
②
Sorry, I don’t like neither.
③
Certainly, why not?
④
Yes, we like these two places.
【单选题】
Sandy could do nothing but _______ to his teacher that he was wrong.
①
admit
②
admitted
③
admitting
④
to admit