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【简答题】
（14分）已知： A是石油裂解气的主要成份且A的产量通常用来衡量一个国家的石油化工水平；请回答下列问题： （1）写出A的结构 。 （2）写出下列反应的反应类型： ① ，④ 。 （3）写出下列反应的化学方程式： ① ；② ； ③ ；⑤ 。
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反馈参考答案：
举一反三
【单选题】目前,尚未给予我国出口商品普惠制的国家是( )
A.
ELGIUM、SPAIN、ITALY
B.
AMERICA、HUNGARY、BULGARIA
C.
AMERICA、AUSTRALIA、NEW ZEALAND
D.
RUSSIA、UKRAINE、KAZAKHSTAN
【单选题】In which of the following is the auditory center of the brain most highly developed?
A.
Humpback whale.
B.
Right whale.
C.
Sperm whale.
D.
Whalebone whale.
【单选题】Gold is used to ensure flexibility, because ______.
A.
it is the most malleable and highly conductive metal known
B.
it is pricey
C.
little is needed and the cost is tiny
D.
all of the above
【单选题】Societies from the primitive to (the highly civilizing) (have used) food, their (most essential) resource, in social bonding celebrations (of all kinds) and in sacred rituals.
A.
the highly civilizing
B.
have used
C.
most essential
D.
of all kinds
【单选题】Which of the following does the prefix “trans-” not mean?
A.
“Beyond”
B.
“Across”
C.
“Moving from...to...”
D.
“In favor of ”
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