试题与答案

写出环丁砜的分子式。

题型:问答题 简答题

题目:

写出环丁砜的分子式。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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此行多一个词:把多余的词用斜线划掉,在该行右边横线上写出该词,并也用斜线划掉。

此行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

此行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

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My friend, Li Mei, spent her vacation in America, where        86        

his mother was doing research in a university medical center        87        

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outside of its windows, where there is a lovely river with ships  93        

passed, and a cobblestone(鹅卵石) street where tourists stop for   94        

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