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【判断题】
凡是具有4n+2个π电子的共轭体系均具有芳香性。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】What kind of roll does a speaker play in the speech process?
A.
The originator of a message that is transmitted to your audience.
B.
The information a speaker communicates to his or her audience.
C.
The means by which a message is communicated.
D.
none of the above
【简答题】排卵是指__________破裂、__________从卵巢排出的过程。
【单选题】用 0.020 mol/L Zn 2+ 溶液滴定 0.020 mol/L EDTA 溶液。已知 lgK ZnY =16.5 , lg a Zn =1.5 , lg a Y =5.0 ,终点时 pZn=8.5 ,则终点误差为( )。
A.
+0.1%
B.
-0.1%
C.
+3%
D.
-3%
【简答题】全身麻醉按药物进入体内的途径，可分为（）和（）两种。
【单选题】What kind of knowledge will you mainly get in the process of learning English songs? ( )
A.
Translation skills
B.
Grammar
C.
Pronuciation
D.
Vocabulary
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