某校化学兴趣小组的同学为研究铜与浓硫酸的反应,分别设计了如下图所示的三套实验装置

题型:实验题

问题:

某校化学兴趣小组的同学为研究铜与浓硫酸的反应,分别设计了如下图所示的三套实验装置:

(1)该小组同学对这三套装置进行了评价,认为甲和乙装置各有优缺点,甲装置的优点是                    ,乙装置的优点是                   

(2)丙装置综合了甲和乙的优点,是一套比较合理的装置,试管C中是      溶液,A中玻璃管可起到防止B中品红溶液倒吸的作用,其原理是               

为使装置中残留气体完全被C溶液吸收,可采取的操作是                  

(3)写出丙装置中发生反应的化学方程式:                                       ,该小组同学用丙装置进行实验过程中发现除了课本上描述的实验现象外,试管A内还生成了白色固体,白色固体成分可能是                            

考点:单质硫金属硫化物二氧化硫三氧化硫
题型:实验题

第二节:课文背诵(20×0.5=10分)

Unit 3

By the way, did you know that this is because you become addicted in three different ways?

First, you can become (101)______ ______ ______ nicotine, which is one of the hundreds of chemicals in cigarettes. …… Secondly, you become addicted (102)______ ______. As you know, if you do the same thing over and over again, you begin to (103)______ ______ ________. Lastly, you can become mentally addicted.

Unit 4

However, the attitudes of scientists towards this rise are completely different. On the one hand, Dr Foster thinks that the trend which increases the temperature by 5 degrees would be (104) ______ ______. …….. (105)_____ _____ _____ _____,  there are those, like George Hambley, who (106)_______ _______ _______ this view and believe that we should not worry. They predict that any warming will be mild with few bad (107)________ ________.

Unit 5

I have the greatest job in the world. I travel to unusual places and (108)________ ________ ________from all over the world. Sometimes ……, sometimes using (109)________ ________ and sometimes meeting local people and tourists, I am never bored.

Today, I am just as enthusiastic about my job as the day I first started. Having studied volcanoes now for many years, I am still amazed at their beauty as well as their (110)_______ _______ _______ great damage.

题型:实验题

国家药品标准中规定的中药组成部分包括()

A.植物药、动物药、矿物药

B.药材、饮片、中成药

C.天然药物、各民族医药

D.原料药、人工制成品

E.道地药材、非道地药材

题型:实验题

两闭锁是指()和()。

题型:实验题

某市政府为克服各部门行政处罚自由裁量权幅度过大带来的问题,将行政处罚权依法细化,将细化后的标准向社会公布,接受市民监督。这项措施[ ]

A.保障了人民群众的表达权,扩大了人民当家作主的权利

B.限制了政府的行政决策权,保障了人民群众的参与权

C.增强了政府工作的透明度,保障了人民群众的知情权

D.增加了政府工作的公开度,扩大了人民群众的监督权

题型:实验题

短暂脑缺血发作并非小病,其严重性在于约有1\3的患者,于首次发作后的()年内发生脑梗赛。

A.1

B.3

C.5

D.7

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