在下列运动过程中都伴随着能量的转化,由重力势能转化为动能的是( ) A. 卫星

题型:选择题

问题:

在下列运动过程中都伴随着能量的转化,由重力势能转化为动能的是(  )

A.

卫星由近地点到远地点

B..

火箭腾空而起

C..

小莉松手铁锁下摆

D..

运动员撑杆上升

考点:动能和势能的应用
题型:选择题

Dear Mum:

Today I’m going to tell you something really special. I know you work very hard and feel tired every day.

Every time you come home and see the messy(杂乱的) house. I know you are very angry with me. But you always say nothing and clean up the house .I always want to help you, but I have so much homework to do. After I finish my homework, I feel like dying. I really want to help you, but I’m so tired too.

I also want to tell you one thing, I love you so much. I usually talk back to you when you say that I don’t study hard enough. But in fact I just want you to praise(赞扬) me more. I will try my best to get good grades and get praise from my teacher. So don’t feel frustrated (失望)about my grades, OK? I have made up my mind that I will study harder and help you to clean the house. I am serious this time. I will have my homework done faster so that I can have more energy to clean the house. I will watch TV less so that I can have more time to study and get good grades. All these things are for one reason: I want to make you happy Mum.

I love you!

With lots of love Sally

小题1:Why is Sally’s mother angry with Sally when she comes back from work?

A.Because she doesn’t study hard.

B.Because she isn’t good at English.

C.Because she doesn’t clean the house.

D.Because she doesn’t finish her homework.小题2:What does Sally’s mother think about her?

A.She thinks Sally is very lazy.

B.She feels frustrated about her.

C.She thinks Sally studies very hard.

D.She thinks Sally is a bad girl.小题3:What does Sally want?

A.Enough money

B.Enough free time

C.Good grades and praise

D.Enough good food.小题4:Why does Sally want to do her homework faster?

A.Because she will have enough time to watch TV.

B.Because she is interested in doing homework.

C.Because she has many important things to do.

D.Because she can have more energy to do some cleanig in her house.小题5:Which of the following is WRONG?

A.Sally feels very tired after she finishes her homework.

B.Sally love her mother deeply.

C.Sally’s teacher feels frustrated about her.

D.Shally wants to make mother happy.

题型:选择题

某年10月1日国庆节是星期三,你能算出这个月共上课多少天吗?

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gene theory(基因学说)

题型:选择题

在建筑产品生产中应用价值工程原理时,应( )。

A.在分析结构、材质等问题的同时,对建筑产品的必要功能进行定义
B.首先确定建筑产品的设计方案,然后再进行功能分析和评价
C.在分析功能的基础上,再去研究结构、材质等问题
D.在分析结构、施工工艺的基础之上,确定建筑产品的功能

题型:选择题

某贸易公司与某建筑公司于2001年10月签订一铝材购销合同,双方约定由贸易公司向建筑公司提供4000吨铝材,某商场为建筑公司提供了保证。后建筑公司因下程需要,与贸易公司约定增加1000吨铝材,但双方对于此事并没有征得保证人某商场的同意,只是贸易公司在事后通知了商场合同这个消息。贸易公司按照双方合同的约定向建筑公司提供了5000吨铝材,但建筑公司一直未交付货款。贸易公司遂向某商场提出要求其代为偿还5000吨铝材的货款以及逾期交款的利息。但商场认为双方对主合同进行变更时没有征得其同意,拒绝承担责任。以下对商场应当承担的责任分析正确的是:

A.商场只对合同变更前的4000吨铝材的货款及其利息承担责任

B.商场对合同变更后的5000吨铝材的货款及其利息承担责任

C.商场只对合同变更后增加的1000吨铝材的货款及其利息承担责任

D.商场不再承担保证责任

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