问题 选择题

不另选试剂,仅利用组内各溶液之间的相互反应,就能将它们区分开来的是

A.HCl、NaCl、NaNO3

B.NaCl、CuSO4、NaOH

C.Na2SO4、Ba(NO3)2、HCl

D.NH4NO3、NaOH、H2SO4

答案

答案:B

A、

 HCl NaCl  NaNO3
HCl ------无现象无现象 
NaCl 无现象 ------无现象 
NaNO3 无现象 无现象 --------
三组中的现象都是无现象,不能鉴别,故A错误;

B、首先根据溶液显蓝色鉴别出硫酸铜,然后将硫酸铜滴入剩余的两种溶液中,会生成蓝色沉淀的是氢氧化钠,没有现象的是氯化钠,可以鉴别,故B正确;

C、

  Na2SO4 Ba(NO32HCl 
Na2SO4 ----沉淀 无现象 
Ba(NO32 沉淀 ------无现象 
HCl 无现象 无现象 ------
分别有两组现象是完全相同的,不能鉴别,故C错误;

D、

 NH4NO3 NaOH H2SO4 
NH4NO3 ------刺激性气味的气体  无现象 
 NaOH刺激性气味的气体 ------无现象 
H2SO4  无现象无现象 -------
分别有两组现象完全相同,不能鉴别,故D错误;

故选B.

多项选择题
阅读理解
Makoto、Mr. Zheng、Mr. Zhu、Jack 和Xiao Wang 正在广州寻找合适的餐厅,第61-65题是对他们个人情况的介绍。阅读下列餐厅的信息(A、B、C、D、E、F),选出符合他们各人需要的最佳选择。选项中有一项是多余的。
小题1:Makoto is a Japanese tourist who has stayed in Guangzhou for a few days. He wants to make a tour of North China but unfortunately he has no time. So he would like to find a restaurant where he can taste northern food and experience the life in the north.
小题2:Mr. Zheng was born in Hunan but went to Japan at an early age. This time he came to Guangzhou to deal with some business affairs. Coming back to his homeland after being away for about 20 years, he hopes to find a restaurant serving food of his home town.
小题3:It is the first time for Mr. Zhu, who comes from the northeast of China, to visit Guangdong Province. He is interested in traditional Cantonese food and Cantonese lifestyle.
小题4: Jack is a successful businessman. He is flying to Guangzhou to meet some people, who are likely to sign a contract with him. He wants to find a high quality restaurant. Of course, it is the quality rather than the price that he cares about.
小题5: Xiao Wang, a migrant worker in Guangzhou, plans to hold a party with his 10 friends. All of them are fond of the Sichuan cuisine. Xiao Wang hopes to spend less than 600 yuan for the dinner.
A
Nanhai Yucun Restaurant
Founded in 1986, Nanhai Yucun Restaurant has always been one of the gourmets’ choices in Guangzhou.
Prices are high, but so is the quality. Just look at the gust list; the King and Queen of Spain, South Korea’s Prime Minister and his wife have eaten here, along with lots of local famous people.
 
B
Dongbeiren
Dongbeiren is meant for northerners. The decoration is basically red—from the paper cuts and the curtains to the Kang (a bed with a table where people can sit comfortably without shoes and with their legs folded). It is perhaps a way to remind the northerners of home or for other people to get in touch with the north. 
 
C
Taotaoju Restaurant
Taotaoju Restaurant is one of Guangzhou’s most well-known traditional Cantonese restaurants, located in a historic building in the heart of the city’s Xiguan District.
You can’t get any more traditional Guangzhou than this, which is a great place for dim sum and seafood. You haven’t lived in Guangzhou until you’ve eaten dim sum in a true local place like Taotaoju. It’s also a popular spot for parties.
 
D
Chongqing Xiaodongtian Restaurant
It’s one of the top Sichuan cuisine restaurants in Guangzhou, featuring Chongqing flavor.
It is a group of chain restaurants in Guangzhou. The food is Sichuan style, but the decoration and surroundings are a bit old.
Like most Sichuan restaurants, the pleasant smell of their traditional hot pot spreads throughout the whole place.
Food here is medium-priced, around 50 RMB per person.
 
E
Maojia Reastaurant
Maojia Reastaurant is a local favorite for strong-flavored Hunan dishes.
It has a strong cultural atmosphere related to Chairman Mao and also introduces Maojia dishes characteristic of tasty Hunan local flavors, which are a bit softer than the traditional Hunan flavor.
 
F
Enmi Japanese Reastaurant
The decoration here is beautiful and peaceful.
A small “courtyard of bamboo” is refreshing while the space between tables is large and comfortable. The diverse sashimi (raw fish slices) is a must-try here.
The food, however, is served slow and the regulated tow hours for ordering is strange.