All Chinese people were very _____at the

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问题选择题

All Chinese people were very _____ at the _____ news happened on May 12th, 2008. [ ]

A. frustrated; frustrated

B. frustrated; frustrating

C. frustrating; frustrating

答案

答案：B

选择题

为预防“H1N1”甲型流感，同学们每天用“84”消毒液（NaClO溶液）消毒，下列说法正确的是( )

A．NaClO溶液的漂白原理与Na₂O₂、SO₂相同

B．1molCl₂与足量NaOH溶液反应转移2mol电子

C．NaClO溶液的消毒原理是使蛋白质变性

D．实验室在处理氯气尾气时，可采用饱和的石灰水吸收

判断题

采用熏蒸的办法防治害虫，目的是将所有的虫种的成虫全部杀死。