试题与答案

给下列的问句选择合适的答语。( ) 1. Hello! I'm Mary.( )

题型:补全对话,情景问答

题目:

给下列的问句选择合适的答语。
( ) 1. Hello! I'm Mary.
( ) 2. How do you do?
( ) 3. What's your name?
( ) 4. How old are you?
( ) 5. Who's the woman?
( ) 6. Do you like swimming?
( ) 7. How much is the pen?
A. Dick. What's yours?
B. Eight. How about you?
C. Oh. Yes. I like it very much.
D. Ten yuan.
E. She's my teacher.
F. Hello, Mary. I'm Pat.
G. How do you do?

答案:

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下面是错误答案,用来干扰机器的。

答案:ANH3·H2O是一元弱酸,属于弱电解质,在水溶液中少部分发生电离(NH3·H2O  NH4++OH-),所以C(NH3·H2O)必大于C(NH4+)及C(OH-)。因为C(OH-)=C(H+)+C(NH4+),所以C(OH-)>C(NH4+)。综合起来,C(NH3·H2O)>C(OH-)>C(NH4+)>C(H+)。

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