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问题 填空题

设函数y=y(x)由参数方程x=t-ln(1+t)，y=t3+t2所确定，则

______．

答案

参考答案：[*]

解析：[考点提示] 参数方程的微分．
[解题分析] 由参数方程求导法则：[*]
有
[*]
所以
[*]

完形填空

A man worked in a post office. His job was to handle all  36  that had unclear addresses. One day he came across a letter which was  37  to God. He opened it and it  38  , "Dear God, I am an 83-year-old woman and I live on a very small pension (养老金). Yesterday someone stole my  39  . There was a hundred dollars in it, which was all the money I had  40  until my next pension comes. Next Thursday is Thanksgiving Day, and I have invited my last two friends for  41 . Without that money, I have  42  to buy food with. I have no family to  43  , and you are my only  44  . Can you please help me?" The man was  45  , and went around showing the letter to all the other workers. Each of them  46 their wallets and donated a few dollars. By the time he  47  his showing, he had collected 96 dollars.  48  then he sent it to the old woman. Thanksgiving Day came and went. The workers 49  forgot about it. Then one day, there came another letter from the old lady to God. All the 50  gathered around when the letter was  51 . It read, "Dear God, how can I ever thank you enough for what you did for me? Because of your kindness, I was able to  52  a lovely dinner for my friends. We had a very  53  day, and I told my friends about your  54 gift. Thank you very much!" Seeing this, all the workers felt 55  with the nice thing they had done. They looked into each other’s eyes and smiled.

小题1:

A．stamps

B．money

C．mail

D．postcards小题2:

A．spoken

B．written

C．recorded

D．pointed小题3:

A．noticed

B．talked

C．read

D．told小题4:

A．clothes

B．purse

C．house

D．food小题5:

A．borrowed

B．wished

C．paid

D．left小题6:

A．dinner

B．fun

C．business

D．picnic小题7:

A．nothing

B．anything

C．something

D．everything小题8:

A．live in

B．live on

C．turn to

D．turn back小题9:

A．family

B．hope

C．friend

D．partner小题10:

A．excited

B．amazed

C．surprised

D．moved小题11:

A．gained

B．earned

C．searched

D．explored小题12:

A．finished

B．planned

C．started

D．toured小题13:

A．Or

B．As

C．And

D．But小题14:

A．gradually

B．usually

C．especially

D．easily小题15:

A．friends

B．workers

C．officers

D．guests小题16:

A．sent

B．replied

C．accepted

D．opened小题17:

A．bring

B．choose

C．prepare

D．enjoy小题18:

A．nice

B．strange

C．common

D．formal小题19:

A．traditional

B．wonderful

C．expensive

D．extra小题20:

A．annoyed

B．confident

C．pleased

D．hopeful
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问答题 简答题

试述用挖补法对门机行走均衡梁开裂处进行修理的步骤。
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