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【单选题】
在下列化合物中, p®p * 跃迁所需能量最大的化合物是( )A.
1,3 - 环已二烯
B.
2,3 - 二甲基 - 1,3 - 丁二烯
C.
1,4 - 戊二烯
D.
1,3 - 丁二烯
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举一反三
【单选题】What does the second paragraph mainly discuss?
A.
Some animals and plants depend on each other for existence.
B.
Some animals and plants develop their relationship easily.
C.
Some plants depend on each other for food.
D.
Some animals live batter together.
【简答题】Consider the following slips of the tongue. What does each reveal about the process of language production? They laked across the swim.The spy was gound and bagged.(3)I will zee you in the bark.
【简答题】What are the major branches of linguistics?What does each of them study? 语言学的主要分支学科有哪些?其研究内容是什么?
【单选题】What does the first sentence of Paragraph 3 imply?
A.
Americans could hardly agree with each other.
B.
It's hard to define what is the essence of America.
C.
Never have two Americans agree on what is the essence of America.
D.
The essence of America might be the diversity of ideas.
【单选题】What does the second paragraph mainly discuss?
A.
Some animals and plants depend on each other for existence.
B.
Some animals and plants develop their relationship easily.
C.
Some plants depend on each other for food.
D.
Some animals live better together.
【简答题】What two items does each participant receive?
【多选题】为了实现透明传输,物理层确定与传输媒体的接口相关的特性有
A.
机械特性：指明接口所用接线器的形状和尺寸、引线数目和排列、固定和锁定装置等。
B.
电气特性：指明在接口电缆的各条线上出现的电压的范围。
C.
功能特性：指明某条线上出现的某一电平的电压的意义。
D.
过程特性 ：指明对于不同功能的各种可能事件的出现顺序。
【单选题】What does the phrase 'walked in each other's shoes' in the first paragraph mean? ______.
A.
To exchange shoes with each other.
B.
To be in each other's situation.
C.
To make choices for each other.
D.
To feel quite uncomfortable.
【单选题】What does the woman imply about the participants?
A.
They are not competing with each other.
B.
They have to pay a high fee.
C.
They tend to be beginning cyclists.
D.
Most of them fail to finish the route.
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