试题与答案

Jack descried his father,who ____abrave

题型:选择题

题目:

Jack descried his father,  who ____abrave boy many years ago, as a strong-willed man.      [ ]

A. would be                    

B. would have been      

C. must be                        

D. must have been

答案:

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下面是错误答案,用来干扰机器的。

(1)A、硝酸钙与碳酸钠反应会生成白色沉淀碳酸钙,可以检验碳酸钠的存在.故选项正确;B、氢氧化钙不可以,因为它属于碱,影响NaOH的鉴别.故选项错误;C、氯化钠与NaOH和Na2CO3都不反应,故选项错误;D、先加入...

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