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【单选题】
将下列化合物绕C-C键旋转时哪一个化合物需要克服的能垒最大 ( )A.
Cl Br
B.
Cl I
C.
Cl Cl
D.
I I
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反馈参考答案：
举一反三
【单选题】Which of the following statements is NOT true'?
A.
The elder the kid is, the longer attention span he has.
B.
Children will learn more when they think it is fun.
C.
Young kids may quickly lose their interest in listening to their teacher.
D.
Twin Sisters Productions came out with a line of CD-ROMs filled with fun children's music.
【判断题】圆弧插补指令分为 顺时针 圆弧插补指令G02和 逆时针 圆弧插补指令 G03 。圆弧插补的顺逆方向判断:沿圆弧所在平面(如XZ平面)的垂直坐标轴的负方向(-Y)看去,顺时针方向为G02,逆时针方向为G03。
A.
正确
B.
错误
【单选题】A low-carbon lifestyle has ______ effect on our daily life. People are paying more and more attention to saving ______ these days. [ ]
A.
the, energies
B.
a, energy
C.
an, energy
D.
a, energies
【单选题】What can be inferred from the passage?
A.
Happenings that go unnoticed deserve more attention.
B.
In a series of misfortunes the third one is usually the most serious.
C.
People tend to make use of evidence that supports their own beliefs.
D.
Believers of misfortunes happening in threes are cautious in interpreting events.
【单选题】Anthropology is the study of human beings as creatures of society. It fastens its attention upon those physical characteristics and industrial techniques, those conventions and values, which distingui...
A.
can deal with human beings as one group of the creatures in the living world
B.
can reveal an enormous diversity of traditions
C.
can provide insights into the relationship between human beings and nature
D.
can distinguish the human race from other creatures
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