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下列关于苯的叙述正确的是（ ） A．反应①为取代反应，有机产物与水混合浮在上层 B．反应②为氧化反应，反应现象是火焰明亮并带有浓烟 C．反应③为取代反应，有机产物是一种烃 D．反应④中1 mol苯最多与3 mol H 2 发生加成反应，是因为苯分子含有三个碳碳双键
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【简答题】While in Banff, make time for a walk around town. A special treat is to go up the mountainside on the Banff Gondola for a surprising view of the valley below. Here is The pines, whose cook has develop...
【简答题】While in Banff, make time for a walk around town. A special treat is to go up the mountainside on the Banff Gondola for a surprising view of the valley below. Here is The Pines, whose cook has develop...
【单选题】—Excuse me, could you tell me ? —It’s just 5 minutes’ walk.
A.
how far it is to go to Nanjing Museum on foot
B.
how far is it to go to Nanjing Museum on foot
C.
how long it takes to walk to Nanjing Museum
D.
how long does it take to walk to Nanjing Museum
【单选题】_____ bad weather it is! We can't go out for a walk.
A.
What
B.
How
C.
What a
D.
How a
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