题目内容

Nose-touching ceremony and haka dance are unique custom of Maoris.

A. 对
B. 错

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Under the influence of Western culture, there were only about half of Maoris could speak fluent Maori language.

A. 对
B. 错

某二溴苯经硝化,只能得到二种一硝基化合物,该二溴苯应为:

A. o-二溴苯
B. m-二溴苯
C. p-二溴苯
D. o-,p-都是

C6H5OCH3(I),C6H5COCH3(II),C6H6(III),C6H5Cl(IV)四种化合物硝化反应速率次序为:

A. I>III>II>IV
B. I>III>IV>II
C. IV>I>II>III
D. I>IV>II>III

苯乙烯催化加氢,在室温低压下得到什么产物?

A. 无变化
B. 乙苯
C. 甲苯
D. 乙基环己烷