问题 选择题

下列不利于食物在口腔中消化的是(   )

A.将食物充分咀嚼

B.将食物冷冻后再食用

C.进食的时候少饮水

D.将食物在口腔中充分搅拌

答案

答案:B

题目分析:A、牙齿的咀嚼可以把食物磨碎,增加食物与消化酶的接触面积,有利于食物的消化,从而可以减轻胃肠的负担,不符合题意;

B、将食物冷冻后再食用,不利于消化,因为消化酶在37℃度的活性最强,冷冻的食物温度低,不利于消化.符合题意;

C、进食的时候少饮水,如果喝水多了,成了泡饭,食物在口腔内还未嚼烂就滑到胃里去了.食物没有经过充分咀嚼,唾液分泌得少,消化将受到影响,营养也不能完全被吸收.不符合题意;

D、舌的搅拌可以使食物与消化液充分的混合,从而增大与消化酶的接触面积,可以更好地进行化学消化;不符合题意.

单项选择题
阅读理解

Most British parents give their teenagers pocket money.Teenagers get between£7 and£20 a week.They spend it on fast food,designed clothes,the cinema,concert,magazines and mobile phones.

1)Lazy parents?

37%of parents pay teenagers to clean the living room,66%of parents pay teenagers to take the rubbish out.

2)Lazy teens?

51%of teenagers don’t make their beds before they leave home.

Only 1 3%of teenagers wash the car for money.

Some parents even pay their teenagers to do their homework.

3)Equality?Not Yet!

Boys get more money than girls for most odd jobs.

For washing the dishes,boys get about£4 and girls get about£1.

4)And if you need some more money?

Teens get an extra£250 a year out of their parents on top of pocket money!

About 50%of teens get gifts or money from their grandparents.

Go to Mum if you need extra money! She gives more than Dad.

5)Where you live makes a difference!

Parents in Scotland and the North of England give more pocket money.

6)Spending

51%of teenagers spend their money on clothes.

39%of teenagers buy cosmetics(装饰品),jewellery and toiletries(洗漱用品).

Less than 30%of teenagers save any money.

7)Earnings

Here are some children who tell us about their pocket money:

Emma:I get£30 a month.I have to take the rubbish out and tidy my room.

James:I get£10 a week.But I have to clean the car,hoover(用真空洗尘器清洗)the house and load and unload the dishwasher.I usually save the money.

Lain:I get£7.50 a week.I have to be“good”but I don’t have to do any jobs for the money.

Richard;I get£5 a week.But our neighbors go away a lot and they give me£25 a week for looking after their cats.

小题1:This passage is mainly about        

A.teenagers everywhere get pocket money

B.how to spend pocket money

C.some bits about pocket money in Britain

D.how to get pocket money小题2:According to the passage,which statement is true?

A.Parents are lazy so they let children do housework.

B.Teens are too lazy to do housework unless they are given pocket money.

C.The pocket money boys and girls get is not equal.

D.It is not right for children to ask for pocket money.小题3:We can infer from the passage that      

A.boys earn more money at home than girls

B.girls earn more money at home than boys

C.only rich parents give children pocket money

D.most children spend their pocket money小题4:Who most probably gets the most money for a whole year according to the passage?

A.Emma

B.J ames

C.Lain

D.Richard