（1）如图为电解水的装置，据实验的有关现象回答： ①A为电源_爱下问搜题

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问题问答题

（1）如图为电解水的装置，据实验的有关现象回答：

①A为电源的______极，（填正或负）．

②如D管中产生气体的质量是16克，则C管中产生气体的质量为______克．

（2）小雨收集到一瓶浑浊的河水，他要模拟自来水厂的净水过程，最终制成蒸馏水．其实验过程如下所示．请回答以下问题．

①A物质的名称是______，操作①的名称是______；

②操作②过程主要是______变化（填“物理”或“化学”）；

③小雨取少量液体D于试管中，加入少量肥皂水，振荡，发现有较多浮渣产生，说明液体D是______水．（填“硬”或“软”）

答案

（1）①与A相连的试管中生成的气体多，是氢气，A是负极．故填：负．

②由2H₂O

通电

.

2H₂↑+O₂↑可知，氧气和氢气的质量比为8：1，如果生成的氧气是16克，那么生成氢气的质量是2克．故填：2．

（2）①明矾能使泥沙水中的悬浮物沉降，过滤可以除去不溶性颗粒．故填：明矾；过滤．

②操作②过程是消毒，属于化学变化．故填：化学．

③加入肥皂水时，如果有较多浮渣产生，说明液体是硬水．故填：硬．

单项选择题

中风病之阳闭，应具备闭证的主要症状，其兼症除哪项以外均是：

A．颜面潮红

B．呼吸气粗

C．口臭身热

D．躁动不安

E．痰涎壅盛

完形填空

完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
It had been a tiring day and I was looking forward to a quiet evening. My __36__ would not be back until late and I had __37__ to sit comfortably in a chair in the _38___ room and read a good book. I put the children to bed _39__ and prepared a cup of coffee for myself. Soon I was seated comfortably with my__40___ in front of me and the sandwich and the cup of coffee on a small table beside me.
I was just beginning to __41__ the food when the telephone rang. I put down my book and hurried to __42___ it. By the time I got back to the living room, my coffee was__43__. I ate the sandwich and begin__44___ cold coffee with the book _45___ open to the front page. _46___ there was a loud knock at the front_47___. It surprised me so much that I spilled (洒)some coffee on my skirt. The man at the door was looking __48___ a certain address and __49___ me to give him some information. It _50___ me a long time to explain something to him. After that , I sat down again and __51__ to read a whole page without further interruption(打扰) --- until the baby woke up. He started __52__ at the top of his voice, __53__ I run upstairs quickly. He was still awake at 11 o’clock when my husband came back. I really wanted to throw something __54____ him when he asked me if I had spent a ___55____ evening.