问题 解答题
2008年6月1日起,我国实施“限塑令”,开始有偿使用环保购物袋.为了满足市场需求,某厂家生产A、B两种款式的布质环保购物袋,每天共生产4500个,两种购物袋的成本和售价如下表,设每天生产A种购物袋x个,每天共获利y元.
成本(元/个)售价(元/个)
A22.3
B33.5
(1)求出y与x的函数关系式;
(2)如果该厂每天最多投入成本10000元,那么每天最多获利多少元?
答案

(1)根据题意得:y=(2.3-2)x+(3.5-3)=-0.2x+2250(4分)

(2)根据题意得:2x+3≤10000

2x+13500-3x≤10000

解得x≥3500元

∵k=-0.2<0,

∴y随x增大而减小

∴当x=3500时,y=-0.2×3500+2250=1550

答:该厂每天至多获利1550元.(8分)

阅读理解

Around twenty years ago I was going through hard times. I could not find a satisfying job. To my shame, I had to drive a school bus to make ends meet and lived in a friend’s house.

One afternoon, while driving through a quiet suburban (郊外的) neighborhood I was so sad that I kept asking myself “Why has my life become so hard?” “What’s wrong with the world?” Then I pulled over the bus to drop off a little girl and as she passed she handed me a pretty earring, saying she found it on the floor of the bus and I should keep it in case the owner came to look for it.

In the evening, the owner did come to look for her earring. When I handed it to her, she got very excited and continued saying “Thanks, you’re a real gentleman.” I told her that she should thank the little girl who had found it. She said, “Yes, and you are a good driver, too. What a lovely world it is!” Then she left with satisfaction. I was touched by her last words. I had thought something was wrong with the world just because of my poor condition. In fact, nothing was wrong with the world. I should change my attitude towards life. I should be positive about life.   

At first it was hard, and then it got easier. Every day I could find things to make me happy. Then one night there was a phone call for me at my friend’s house from a lady who was a manager in a large hospital. She said she had read my application form and asked me if I would like to work in the hospital. I said yes and got the job. Looking back at the experience I know the most important is to have a positive attitude towards life.

小题1:We know from the second paragraph that ________.

A.the author cried while driving that afternoon

B.a girl picked up an earring before getting off

C.there was only one passenger on the bus

D.the girl gave the author an earning as a gift小题2:The author decided to have a change in life because ________.

A.what the earring owner said moved him

B.he didn’t want to be a driver any more

C.his friends helped him become positive

D.he was offered a better job in a hospital小题3:When the author got a call from the manager of the hospital, he felt ________.

A.annoyed

B.delighted

C.shocked

D.disappointed小题4:Who was the owner of the earring lost on the bus according go the passage?

A.One of the author’s friends.

B.A real gentleman

C.A manager in a hospital

D.Not mentioned小题5:What does the author want to show in this passage?

A.Lost things should be returned to the owner.

B.Life is usually hard for the young at the beginning.

C.One should hold a positive attitude towards life.

D.It is not easy to find a good job nowadays.

单项选择题