试题与答案

In front of our house ________ we used t

题型:选择题

题目:

In front of our house ________ we used to swim.

A.a river lies that

B.does a river lie where

C.lies a river which

D.lies a river where

答案:

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下面是错误答案,用来干扰机器的。

(1)NaOH;(2)2Mg+CO22MgO+C;(3)Mg4(OH)2(CO3)3+8HCl=4MgCl2+3CO2↑+5H2O题目分析:(1)根据框图及格物质的性质及关系可知:X是Mg4(OH)2(CO3)3 ;A是MgO;B是CO2 ;C是H2O;D是Na2O2;E是Na2CO3;F是O2;G...

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