1.单选题- (共2题)
| A．源水→过滤→加氯气→加明矾→沉淀→净水 |
| B．源水→加氯气→过滤→加明矾→沉淀→净水 |
| C．源水→加明矾→加氯气→过滤→沉淀→净水 |
| D．源水→加明矾→沉淀→过滤→加氯气→净水 |
2.选择题- (共3题)
根据短文内容及首字母提示,填写所缺单词。
Hip-hop dancing(街舞) is popular with many young people today. They like it b{#blank#}1{#/blank#} they can invent their own moves. They use this dance to s{#blank#}2{#/blank#} their love for life. It a{#blank#}3{#/blank#} shows that they feel good about life, that they just want to be themselves and enjoy life, and that they are not afraid of problems.
Hip-hop dancing has a h{#blank#}4{#/blank#} of more than 20 years. It f{#blank#}5{#/blank#} began in the 1980s in the US. In early times, it was seen in New York and Los Angles. At that time, many young black people often danced to the m{#blank#}6{#/blank#} in the streets. They used their l{#blank#}7{#/blank#}, arms, heads and even shoulders to dance. Many young people still use most of these moves today.
Hip-hop dancing became popular all over the world because of the 1983 movie Flashdance. Some people performed Hip-hop dancing in the movie People enjoyed their performance. They began to dance l{#blank#}8{#/blank#} them. Then it became popular There are t{#blank#}9{#/blank#} kinds of Hip-hop dancing: new school and old school. More and more young people are l{#blank#}10{#/blank#} Hip-hop dancing. People believe that it is a good way to exercise their bodies, and that it is good for their health.
3.填空题- (共3题)
(1)该泉水属于________硬水(填写“暂时”或“永久”)。
(2)若要除去Ca2＋、Mg2＋可以往水中加入石灰和纯碱，试剂添加顺序为________，原因是___________________________________。
(3)目前常用阴、阳离子交换树脂来进行水的软化，水中的Ca2＋、Mg2＋与交换树脂的____________起离子交换作用。当阴离子交换树脂失效后可放入__________溶液中再生。
(4)岛上还可以用海水淡化来获得淡水。下面是将海水通过电渗析法获得淡水的原理图，已知海水中含Na＋、Cl－、Ca2＋、Mg2＋、SO42－等离子，电极为惰性电极。请分析下列问题：
①阳离子交换膜是指__________(填“A”或“B”)。
②写出通电后阳极区的电极反应式：_________________________________；
阴极区的现象是：_________________________________________________。
(1)观察下图(Ⅰ)，若用1 L水来代表地球上的总水量，要比较精确地量取地球上的淡水量，应选择的仪器是__________。
| A．100 mL烧杯 | B．50 mL烧杯 | C．100 mL量筒 | D．50 mL量筒 |
(2)图(Ⅱ)是某居民小区中垃圾收集点(小圈)的布局，它在选址上存在的问题有________；垃圾收集点选址应考虑的因素包括__________________________
(3)有人设想在住宅小区附近建立小型生活垃圾焚烧厂，其流程如图(Ⅲ)。请将图(Ⅲ)中①②③所要表达的内容填在下面的横线上。
图(Ⅲ)
①______________________________；
②________________________________；
③_________________________________。
离子交换法常用于工业锅炉用水的软化。离子交换剂多种多样，磺化煤(NaR)就是一种阳离子交换剂。
(1)写出用磺化煤软化含Ca2＋、Mg2＋浓度较高的硬水的化学方程式
(2)用药剂软化法软化过的水总是含有一定浓度的Ca2＋、Mg2＋，其原因是
(3)参考烧水后的锅或壶中结有水垢的现象分析说明，如果用硬度太高的水作锅炉用水，主要的不利因素是
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【1】题量占比
单选题:(2道)
选择题:(3道)
填空题:(3道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：3
7星难题：0
8星难题：1
9星难题：1