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近年来，地震、洪水、泥石流等各种自然灾害频发，灾害过后，对环境进行消毒杀菌、获取洁净的饮用水都需要大量消毒剂，开发具有广谱、高效、低毒的杀菌、消毒剂是今后发展的趋势。

(1)Cl2、H2O2、ClO2（还原产物为Cl-）、O3（1 mol O3转化为1 mol O2和1 mol H2O）等物质常被用作消毒剂。等物质的量的上述物质中消毒效率最高的是________（填序号）。

A.Cl2 B.H2O2 C.ClO2 D.O3

(2)氯氨(NH2Cl)可作杀菌剂，请用化学方程式表示氯氨在水中的杀菌机理：___________________。

(3)氯溴海因(C5H6BrClN2O2)是一种比较安全的氯气和氯制剂的替代产品，其结构简式如图所示。氯溴海因在水中的水解过程比较复杂，主要生成次卤酸和海因，请写出海因的结构简式：____________。

(4)过碳酸钠是一种多用途的新型固体漂白剂，化学式可表示为Na2CO3·3H2O2，它具有Na2CO3和H2O2的双重性质。下列物质中不能使过碳酸钠失效的是________（填序号）。

A．MnO2 B．KMnO4溶液 C．稀盐酸 D．NaHCO3溶液

(5)消毒剂亚氯酸钠(NaClO2)在常温与黑暗处可保存一年。亚氯酸不稳定可分解，反应的离子方程式为： HClO2→ClO2↑+H++Cl-+H2O（未配平）。在该反应中，当有1 mol ClO2生成时，转移的电子数是______。

答案

(1)C

(2)NH4Cl+H2O=NH3+HClO

(3)

(4)D

(5)6.02×1023

填空题
请阅读下面短文。根据短文内容从下面方框内的七个选项中，选择五个还原到文中，使短文意思通顺、结构完整。
    
     1. ______ It has around 3 billion fans-nearly half the world's population! And about 300 million
people play this game. That's 4 percent of the world' s population! 
     2. ______ Many people in old days played early forms (形式) of this modern game. Cu ju (蹴鞠), a
ball-kicking game in China, was reported as early as 2,500 B.C. Around the same time in Greece, people
were also playing a similar ball game without using their hands.
     But modern soccer didn't become official (官方的) until 1863. An Englishman called Cobb Morley
introduced the idea of a soccer association (联盟). 3. _______ From then on, other associations in the
countries were set up. They came together-to make up the FIFA, which organizes the World Cup.
     It's not easy to tell what makes soccer so popular. 4. ______ Soccer needs only two feet and a ball.
This makes it a sport that developing countries can easily play. Some of the sport' s best players come from
these poor nations. 
     5. _____ The sport's no-hands rule makes beautiful dance-like movements on the field. What's more,
this sport excites the heart. Teams might score only a few times each match, so matches can turn around
suddenly.
     No one knows who will win at the next World Cup. But one thing is certain: The world will be watching.
A. He also wrote the sport's official rules.
B. Soccer is the world's favorite sport.
C. Playing soccer is good for your health.
D. But one reason is how simple the sport is.
E. People love soccer as well as their countries.
F. It's hard to say where soccer's birthplace is.
G. Soccer performances are pleasing to the eyes.
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单项选择题

喉癌最常见的部位是()

A．喉室

B．会厌

C．室带

D．声带

E．假声带
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