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【单选题】
化合物 中存在的共扼体系有 :A.
σ-π ， π-π
B.
p- π, π-π
C.
σ-π, p-π
D.
σ - π, p-π, π-π
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反馈参考答案：
举一反三
【简答题】简述网络拓扑结构
【单选题】—Could you tell me _______, Mary? —Of course. Go straight, and you’ll see it on your right.
A.
where is the cinema
B.
where the cinema is
C.
where was the cinema
D.
where the cinema was
【简答题】某金属液分别按图示的四种冷却曲线冷却,其中 :
【单选题】If you______Mary, could you tell her I'd like to see her this weekend?
A.
go into
B.
run into
C.
look after
D.
look into
【简答题】某药材呈球形或略呈五角状扁球形,气芳香浓郁,味辛辣而苦,该药材是( )。A.桃仁B.金樱子C. 吴茱萸D.小茴香A. 1 B. 1 C. 1 D. 1
【单选题】---Mary, I heard there was an explosion in Luzhou. Could you tell me how it _______? ---Sorry, I don’t know much about it either.
A.
came on
B.
came about
C.
came out
D.
came over
【简答题】创建图像提交按钮,应将 INPUT 标记符的 type 属性指定为
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