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【简答题】
大气污染物氟里昂-12的化学式是CF 2 Cl 2 ．下面关于氟里昂-12的说法正确的是（　　） A．没有固定的熔沸点 B．分子中的碳原子是饱和的 C．属于正四面体的空间结构 D．是甲烷的一种同系物
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参考答案：
举一反三
【单选题】No matter how bright a talker you are, there are times when it’s better ______ silent.
A.
remain
B.
be remaining
C.
to remain
D.
having remained
查看完整题目与答案
【单选题】米色的衣服适合( )皮肤的人穿着,有优雅、洁净的美感。
A.
白皙
B.
偏黄
C.
偏黑
D.
. 偏红
查看完整题目与答案
【单选题】下极限尺寸减去其公称尺寸所得的代数差为
A.
上极限偏差
B.
下极限偏差
C.
基本偏差
D.
实际偏差
查看完整题目与答案
【单选题】Why is the book Silent Spring important to America' s environmental protection?
A.
It describes a silent spring.
B.
It topped the book sales lists.
C.
It changed how American thought about nature.
D.
It includes all Carson's research achievements.
查看完整题目与答案
【单选题】The phrase "Silent scorn" in "Anyone trying to finish his sentence for him feels the silent scorn of that imperturbably flicking finger" implies
A.
Hawking is silent to those who wants to help him.
B.
Hawking is very cynicic.
C.
Hawking does not want to rely on others to handle daily communications.
D.
Hawking is very hard working in handling daily communications.
查看完整题目与答案
【单选题】The phrase 'the silent revolution'(Line 6, Paragraph 4)implies that population aging will
A.
be a violent process.
B.
take the world by surprise.
C.
make the world different.
D.
happen unnoticed.
查看完整题目与答案
【单选题】短视频以什么为主要传播渠道?
A.
电视
B.
手机APP
C.
电影院
D.
网站
查看完整题目与答案
【单选题】It's the media's responsibility to help those who are kept silent by their humble social positions to ___________ their wishes.
A.
ventilate
B.
articulate
C.
inaugurate
D.
mediate
查看完整题目与答案
【单选题】下极限尺寸减去其公称尺寸所得的代数差是
A.
上极限偏差
B.
下极限偏差
C.
基本偏差
D.
实际偏差
查看完整题目与答案
【单选题】The phrase 'the silent revolution' (Para. 4) implies that population aging will _____.
A.
be a violent process
B.
take the world by surprise
C.
make the world different
D.
happen unnoticed
查看完整题目与答案
相关题目：
【单选题】No matter how bright a talker you are, there are times when it’s better ______ silent.
A.
remain
B.
be remaining
C.
to remain
D.
having remained
查看完整题目与答案
【单选题】米色的衣服适合( )皮肤的人穿着,有优雅、洁净的美感。
A.
白皙
B.
偏黄
C.
偏黑
D.
. 偏红
查看完整题目与答案
【单选题】下极限尺寸减去其公称尺寸所得的代数差为
A.
上极限偏差
B.
下极限偏差
C.
基本偏差
D.
实际偏差
查看完整题目与答案
【单选题】Why is the book Silent Spring important to America' s environmental protection?
A.
It describes a silent spring.
B.
It topped the book sales lists.
C.
It changed how American thought about nature.
D.
It includes all Carson's research achievements.
查看完整题目与答案
【单选题】The phrase "Silent scorn" in "Anyone trying to finish his sentence for him feels the silent scorn of that imperturbably flicking finger" implies
A.
Hawking is silent to those who wants to help him.
B.
Hawking is very cynicic.
C.
Hawking does not want to rely on others to handle daily communications.
D.
Hawking is very hard working in handling daily communications.
查看完整题目与答案
【单选题】The phrase 'the silent revolution'(Line 6, Paragraph 4)implies that population aging will
A.
be a violent process.
B.
take the world by surprise.
C.
make the world different.
D.
happen unnoticed.
查看完整题目与答案
【单选题】短视频以什么为主要传播渠道?
A.
电视
B.
手机APP
C.
电影院
D.
网站
查看完整题目与答案
【单选题】It's the media's responsibility to help those who are kept silent by their humble social positions to ___________ their wishes.
A.
ventilate
B.
articulate
C.
inaugurate
D.
mediate
查看完整题目与答案
【单选题】下极限尺寸减去其公称尺寸所得的代数差是
A.
上极限偏差
B.
下极限偏差
C.
基本偏差
D.
实际偏差
查看完整题目与答案
【单选题】The phrase 'the silent revolution' (Para. 4) implies that population aging will _____.
A.
be a violent process
B.
take the world by surprise
C.
make the world different
D.
happen unnoticed
查看完整题目与答案
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