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CO 2 的临界温度为31℃，临界压强为73×10 5 Pa，求1molCO 2 的临界体积．
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【单选题】—Could you tell us _____ to travel from Earth to Mars by spaceship? —It takes months, I think. [     ]
A.
how far it takes
B.
how long it takes
C.
how long does it tak
D.
how soon does it take
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【判断题】数据表中有多个字段是主键,那么其中某一字段对应的记录值是不可以重复的。
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下选项中,能反映提倡人伦价值,重视道德义务的是( )。
A.
“己欲立而立人，己欲达而达人”
B.
墨子则提出“兼相爱，交相利”的思想
C.
“苟利国家生死以，岂因祸福避趋之”
D.
宋代的思想家们提出了“忠.孝.节.义”四大德目
查看完整题目与答案
【单选题】以下选项中反映传统道德追求精神境界,向往理想人格的是( )
A.
吾日三省吾身
B.
仁义礼智信
C.
己欲立而立人，己欲达而达人。
D.
为天地立心，为生民立命，为往圣继绝学，为万世开太平。
查看完整题目与答案
【单选题】. ---- Excuse me, Madam. I wonder if this bus goes to the East Lake? ----  ___________. You should take Bus No. 521.
A.
Sure, it does
B.
No, it isn’t
C.
Oh, sorry, I’m afraid not
D.
What a pity! It’s not true
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【单选题】听力原文：Man: Honey, where is my pen? Woman: Why not use your computer? Writing by hand takes more time and it isn't as convenient if you need to make any changes. Q: Why does the woman suggest using the ...
A.
It's more convenient to make changes when using a computer.
B.
A computer uses less paper.
C.
It's less expensive to use the computer.
D.
Changes are always needed when writing.
查看完整题目与答案
【简答题】主键,( )KEY,用于唯一标识某条记录,作为主键的值必须唯一,且不能为( ),主键可以是单一字段,也可以是多个字段的组合,每个数据表最多能有( )个主键约束
查看完整题目与答案
【判断题】在隐函数定理条件下，所确定的隐函数在局部邻域内可导，但导函数在该局部邻域内不一定连续。
A.
正确
B.
错误
查看完整题目与答案
【简答题】第七节 在本节中,你将读到一篇短文。根据所读内容,在短文后表格中的空格处填入一个恰当的词,并将答案写在答题卡上对应处。每空一词。 Today our knowledge of food and what it does for our bodies is far more advanced than that of the old times. Now we know about vitamins...
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【单选题】It is a curious phenomenon of nature that only two species practice the art of war -- men and ants, both of which, significantly, maintain complex social organizations. This does not mean that only me...
A.
There are different factors which may lead to war.
B.
War has been rooted in and will develop with human history.
C.
Both men and ants maintain complex social organizations.
D.
Only men and ants have developed and practiced the art of war.
查看完整题目与答案
相关题目：
【单选题】—Could you tell us _____ to travel from Earth to Mars by spaceship? —It takes months, I think. [     ]
A.
how far it takes
B.
how long it takes
C.
how long does it tak
D.
how soon does it take
查看完整题目与答案
【判断题】数据表中有多个字段是主键,那么其中某一字段对应的记录值是不可以重复的。
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下选项中,能反映提倡人伦价值,重视道德义务的是( )。
A.
“己欲立而立人，己欲达而达人”
B.
墨子则提出“兼相爱，交相利”的思想
C.
“苟利国家生死以，岂因祸福避趋之”
D.
宋代的思想家们提出了“忠.孝.节.义”四大德目
查看完整题目与答案
【单选题】以下选项中反映传统道德追求精神境界,向往理想人格的是( )
A.
吾日三省吾身
B.
仁义礼智信
C.
己欲立而立人，己欲达而达人。
D.
为天地立心，为生民立命，为往圣继绝学，为万世开太平。
查看完整题目与答案
【单选题】. ---- Excuse me, Madam. I wonder if this bus goes to the East Lake? ----  ___________. You should take Bus No. 521.
A.
Sure, it does
B.
No, it isn’t
C.
Oh, sorry, I’m afraid not
D.
What a pity! It’s not true
查看完整题目与答案
【单选题】听力原文：Man: Honey, where is my pen? Woman: Why not use your computer? Writing by hand takes more time and it isn't as convenient if you need to make any changes. Q: Why does the woman suggest using the ...
A.
It's more convenient to make changes when using a computer.
B.
A computer uses less paper.
C.
It's less expensive to use the computer.
D.
Changes are always needed when writing.
查看完整题目与答案
【简答题】主键,( )KEY,用于唯一标识某条记录,作为主键的值必须唯一,且不能为( ),主键可以是单一字段,也可以是多个字段的组合,每个数据表最多能有( )个主键约束
查看完整题目与答案
【判断题】在隐函数定理条件下，所确定的隐函数在局部邻域内可导，但导函数在该局部邻域内不一定连续。
A.
正确
B.
错误
查看完整题目与答案
【简答题】第七节 在本节中,你将读到一篇短文。根据所读内容,在短文后表格中的空格处填入一个恰当的词,并将答案写在答题卡上对应处。每空一词。 Today our knowledge of food and what it does for our bodies is far more advanced than that of the old times. Now we know about vitamins...
查看完整题目与答案
【单选题】It is a curious phenomenon of nature that only two species practice the art of war -- men and ants, both of which, significantly, maintain complex social organizations. This does not mean that only me...
A.
There are different factors which may lead to war.
B.
War has been rooted in and will develop with human history.
C.
Both men and ants maintain complex social organizations.
D.
Only men and ants have developed and practiced the art of war.
查看完整题目与答案