问题 实验题

分液漏斗是往密闭的反应容器中随时填加液体的一种仪器。根据下列装置图填空:

(1)写出D. E图中数字标号的仪器名称①             ②             。

(2)某研究性学习小组计划在实验室制甲烷. 一氧化碳和一种具有水果香味的物质乙酸乙酯,经查资料甲烷和一氧化碳都是密度比空气小且不溶于水的气体,制取这三种物质的反应原理如下:

醋酸钠固体+碱石灰固体Na2CO3+CH4↑,

H2C2O4CO2↑+ CO↑+H2O(H2C2O4常温下为固体,浓硫酸常温下为液体)

CH3COOH+ C2H5OHCH3COOC2H5+ H2O(CH3COOH和C2H5OH常温下均为液体)制取甲烷、一氧化碳、 乙酸乙酯三种物质的反应发生装置分别为                            、               ,甲烷、一氧化碳的收集装置分别为                             (填字母序号,如有两个答案只需写一个)。

(3)若选择B装置用高锰酸钾制取氧气的发生装置,则B装置要做少许改进,你的改进是                  

答案

(1)集气瓶,水槽

(2)B、C、A,D或E、E

(3)在试管口加一团棉花

单项选择题
阅读理解

It tastes just like chicken

Away from home, eating is more than just a way to keep your stomach full.It is a language all its own, and no words can say, "Glad to meet you ...glad to be doing business with you ..." quite like sharing a meal offered by your host.

Clearly, mealtime is not the time for you to say, "Thanks, but no thanks." Acceptance of the food on your plate means acceptance of host, country, and company.So, no matter how difficult it may be to swallow, swallow.Or, as one experienced traveler says, "Travel with a cast-iron stomach and eat everything everywhere."

Often, the food offered represents proudly your host country’s eating culture.What would Ataiericans think of a French person who refused to take a bite of homemade apple pie or sirloin? Our discomfort comes not so much from the thing itself; it comes from our umamiliarity with it.After all, an oyster has remarkably the same look as a sheep’s eye; and a first look at a lobster would remind almost anybody of a creature from a science fiction movie, not something you dip in butter and eat.By the way, in Saudi Arabia sheep’s eyes are a famous dish and in parts of China it’s bear’s paw soup.

Can you refuse such food without being rude? Most experienced business travelers say no, at least not before taking at least a few bites.It helps, though, to slice any item very thin.This way, you minimize the taste and the reminder of where it came from.Or, " Swallow it quickly, " as one traveler recommends."I still can’t tell you what sheep’s eyeballs taste like." As for dealing with taste, the old line that "it tastes just like chicken" is often thankfully true.Even when the "it" is really rat or snake.

Another useful piece of advice is not knowing what you are eating.What’s for dinner? Don’t ask. Avoid glancing into the kitchen or looking at English-language menus.Your host will be pleased that you are eating the food he offers, and who knows? Maybe it really is chicken in that soup.

小题1:The purpose of the article is to ____.

A.introduce unfamiliar food

B.share the writer’s personal experiences

C.suggest ways to overcome a cultural barrier

D.advise on how to politely refuse to eat foreign food小题2:According to the writer, people hesitate at strange food mainly due to ____.

A.the way it looks

B.safety worries

C.lack of information about it

D.the unfamiliar atmosphere小题3:From the article we can infer that ____.

A.an American may feel comfortable with sirloin

B.one should refuse strange food after a few bites

C.English-language menus are not always dependable

D.one needs a cast-iron stomach to travel in other cultures小题4:One may say "It tastes just like chicken." when ____.

A.showing respect for chicken-loving nations

B.greeting people with different dieting habits

C.evaluating chefs at an international food festival

D.getting someone to try a visually unpleasant meal