问题 不定项选择题

已知甲、乙、丙、丁四种物质,它们在化学反应中的关系是:甲+乙→丙+丁。对于此反应,下列说法正确的是[ ]

A.若丙、丁为盐和水,则甲和乙一定是酸和碱

B.若甲为10g、乙为20g,反应后生成的丙和丁的质量总和一定为30g

C.若该反应为复分解反应,则生成物中一定有水

D.若甲与丙是单质、乙与丁是化合物,则该反应一定是置换反应

答案

答案:D

选择题
阅读理解

阅读理解

      I hated dinner parties.But I decided to give them another shot because I'm in London.And my friend

Mallery invited me.And because dinner parties in London are very different from those back in New

York.There, "I'm having a dinner party" means:"I'm booking a table for 12 at a restaurant you can't

afford and we'll be sharing the cheque evenly, no matter what you eat."Worse, in Manhattan there is

always someone who leaves before the bill arrives.They'll throw down cash, half of what they owe, and

then people like me, who don't drink,end up paying even more.But if I try to use the same trick,the

hostess will shout:"Where are you going?"And it's not like I can say I have somewhere to go:everyone

knows I have nowhere to go.

     But in London, dinner parties are in people's homes.Not only that, the guests are an interesting mix.

The last time I went to one, the guests were from France, India, Denmark and Nigeria; it was like a

gathering at the United Nations.In New York, the mix is less striking.It's like a gathering at Bloomingdale's, a wellknown department store.

      For New Yorkers,talking about other parts of the world means Brooklyn and Queens in New York

.But at Mallery's, when I said that I had been to Myanmar recently, people knew where it was.In New

York people would think it was a usual new club.

1. What does the word "shot" in Paragraph 1 probably mean?

A. Choice.  

B. Try.

C. Style.      

D. Goal.

2. What does the writer dislike most about dinner parties in New York?

A. There is a strange mix of people.

B. The restaurants are expensive.

C. The bill is not fairly shared.

D. People have to pay cash.

3. What does the author think of the parties in London?

A. A bit unusual.            

B. Full of tricks.

C. Less costly.                

D. More interesting.

4. What is the author's opinion of some New Yorkers from her experience?

A. Easygoing.            

B. Selfcentred.

C. Generous.              

D. Conservative.