下列为小红同学在实验室制取并检验二氧化碳性质的实验装置示意图。 试回答: (1

题型:实验题

问题:

下列为小红同学在实验室制取并检验二氧化碳性质的实验装置示意图。

试回答:

(1) 仪器的名称:a___________;b__________。

(2) 请你提出用A装置制取气体时的一条注意事项__________。A装置还可以用来制取_________气体,制取该气体所需药品是_________和__________。

(3)该同学在实验过程中,将A中产生的气体通入到B中,观察到澄清石灰水没有变浑浊,试分析其原因_______________________。

(4)该同学要用集气瓶收集一瓶纯净的二氧化碳,如何验满?_________________。

(5)该同学用C瓶收集了一瓶纯净的二氧化碳,然后向其中倒入浓氢氧化钠溶液,迅速用事先绑好一个小气球的胶塞塞紧,振荡,可以观察到小气球逐渐___________。其原因是____________________,请写出C瓶中反应的化学方程式___________________。

(6)利用探究实验B和C,可以验证二氧化碳能与________类物质发生反应。二氧化碳还有哪些性质,试举出其性质,并写出与之相关的一条用途。性质:_______________,对应的用途:_____________;

考点:二氧化碳的制取和收集
题型:实验题

下列哪项不是慢性胃溃疡恶变的征象()

A.龛影周围出现小结节状充盈缺损,犹如指压迹

B.龛影周围黏膜皱襞呈杵状增粗或中断

C.龛影变为不规则或边缘出现尖角征

D.治疗过程中龛影逐渐增大

E.龛影周围黏膜皱襞纠集,呈辐射状

题型:实验题

阅读理解

     Many of us already know about several American superstitions(迷信). Having a black cat cross your

path, walking under a ladder, and breaking a mirror are all bad luck. In addition, there are many other

superstitions that are worth knowing. Understanding them will keep you safe from evil spirits -if you believe

in such things -and impress your American friends when you mention them.

     Like the superstitions in other cultures, American superstitions often involve the things important in daily

life, such as health, numbers, and marriage. For example, have you ever had a cough that would not go

away? According to one American superstition, you should take a piece of your hair and put it between

two slices of buttered bread. Next, feed this hair sandwich to a dog and say, "Eat well, you hound, may

you be sick and I be sound." This will trick the evil spirits and help your cough. It will also raise some

eyebrows if you try it.

     In American superstitions, the number three is very important. Often, Americas will say, "All things

come in threes." Three is lucky because it represents the traditional family: mother, father, and child.

Therefore, gifts, letters, and guests will often arrive at your home in groups of three. However, it is also

possible for bad events, like accidents and funerals, to come in threes as well.

     Another time people pay attention to superstitions is when they get married. During a wedding, brides

must wear or carry "something old, something new, something borrowed, and something blue". The old

and borrowed things will bring luck to the person who gives them to the bride. The new and blue things

will bring good fortune to the bride herself. The next time someone you know is getting married, be sure to

recite this phrase.

     As it would be unlucky to discuss one more superstition, we will wind things up here. Keep your fingers

crossed, and stay lucky!

1. The passage is most probably entitled _____.       

A. American's Bad Luck

B. Cross-culture and Superstitions

C. American Superstitions

D. Daily Life in Superstitions

2. The underlined sentence in the second paragraph "It will also raise some eyebrows if you try it."

means _____.       .

A. when you try it, the dog will raise its eyebrows.

B. you will make people surprised when you try this trick

C. only if you raise your eyebrows can the trick work

D. you will believe in the trick after you try it

3. In American's view, the number three is a(n) _____ number.

A. lucky

B. unlucky

C. special

D. ordinary

4. On the wedding, the bride often uses old and borrowed things so as to _____.         .

A. save some money for the wedding

B. bring good luck to the people who give them to the bride

C. give the good luck to the bride herself

D. pass the bad luck to others

5. After reading the passage, we may feel it is written in a _____ tone.

A. formal

B. serious

C. humorous

D. critical

题型:实验题

在上、下锅筒之间的烟气通道内布置密集的水管受热面叫()。

题型:实验题

下列需酌情加适量防腐剂的浸出制剂是()

A.酒剂

B.酊剂

C.煎膏剂

D.合剂

E.汤剂

题型:实验题

治疗肾虚引起的胎动不安及屡有滑胎者,首选方剂是

A.寿胎丸

B.温经汤

C.圣愈汤

D.泰山磐石散

E.保阴煎

更多题库