关于机械能守恒，下列说法正确的是（   ）

根据短文理解，选择正确答案。

Letter One

Dear Editor,

    After I finish my homework, I often go online and chat with my friends. Sometimes I play Internet games. But my parents hate to see me playing games on the computer. Maybe they have heard too much news about how QQ and Internet games harm children. Once I went to a net bar to play games after school. But after that I told my parents that I was playing basketball at school. I said so because I didn't want to make them unhappy. I feel bad about it. However, I need to rest for a while by playing computer games after studying for a long time. I really want my parents to understand that. Do foreign parents do the same to their children? Please help me.

Li Ping, Nantong

Letter Two

Dear Li Ping,

    I think it's not strange for parents to keep their children away from anything bad. Foreign parents will do the same as your parents! They may not let their children watch TV for too long a time, or like your parents, they don't want their children to play computer games.

    Talk to your parents and be honest to them, I think. Tell them what you are doing and why you are doing so to make them understand you. It's never good to do things behind your parents' backs. They aren't fools as you think sometimes! Our parents seem to know what is the best for us. Remember: to be honest is the best way.

Good luck,

Rebecca

根据短文理解，选择正确答案。

Letter One

Dear Editor,

    After I finish my homework, I often go online and chat with my friends. Sometimes I play Internet games. But my parents hate to see me playing games on the computer. Maybe they have heard too much news about how QQ and Internet games harm children. Once I went to a net bar to play games after school. But after that I told my parents that I was playing basketball at school. I said so because I didn't want to make them unhappy. I feel bad about it. However, I need to rest for a while by playing computer games after studying for a long time. I really want my parents to understand that. Do foreign parents do the same to their children? Please help me.

Li Ping, Nantong

Letter Two

Dear Li Ping,

    I think it's not strange for parents to keep their children away from anything bad. Foreign parents will do the same as your parents! They may not let their children watch TV for too long a time, or like your parents, they don't want their children to play computer games.

    Talk to your parents and be honest to them, I think. Tell them what you are doing and why you are doing so to make them understand you. It's never good to do things behind your parents' backs. They aren't fools as you think sometimes! Our parents seem to know what is the best for us. Remember: to be honest is the best way.

Good luck,

Rebecca

读图甲和图乙，完成下列问题．

冰壶是冬奥会的正式比赛项目．运动员将冰壶推出后，冰壶在滑行途中水平方向受到的力有（   ）

冰壶是冬奥会的正式比赛项目．运动员将冰壶推出后，冰壶在滑行途中水平方向受到的力有（   ）

阅读下面短文。从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

    Each of us has goals for life. Some of these may be long-term (长期的) or1lifetime ones, and other dreams or wishes for more immediate satisfaction.

    Just as you2great pleasure when you're trying to3short-term goals, there's also power in having long-term and lifetime goals. Both 4are valuable and serve each other. In order to be5in achieving a short- or long-term wish or goal, you must place your focus on the6result and train your mind on either a moment-to-moment, day-to-day, month-to-month, or year-to-year level.

    For example,7a farmer is to plow (耕地) a straight line, he must keep his eye on a faraway point. If his attention is8just a few feet in front of him, he will not plow straight. So, in order for his field to be plowed straight, he must 9and focus on his long-term goal.

    Focusing on a long-term goal can10the energy to get things done in the11. For instance, when a runner sets a(n) 12to run a mile, he'll13be tired when he14the one-mile mark. 15if this same runner sets a goal to run ten miles, he probably won't even be sweating (出汗) upon16this same one-mile mark. If this very same runner was to set a goal to run 26 miles and keep his mind on the completion of this long17, not only wouldn't he be sweating, but most likely he wouldn't even be out of breath as he ran by the18mark.

    Long-term goals,19, can't be achieved without first achieving20goals. We may have a goal to climb a ladder (梯子), but we have to take one step at a time in order to reach the top.

某同学为了体验伽利略对自由落体运动的研究过程，将一重为10N的铅球从教学楼上自由释放，1s末速度大小为10m/s，则此时重力的功率为（   ）

某同学为了体验伽利略对自由落体运动的研究过程，将一重为10N的铅球从教学楼上自由释放，1s末速度大小为10m/s，则此时重力的功率为（   ）

如图所示，质量相等的A、B两物体紧贴在匀速转动的圆筒的竖直内壁上，随圆筒一起做匀速圆周运动，则下列说法中正确的是（   ）

假如英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文。文中共有10处错误，每句中最多有两处。错误涉及单词的增加、删除或修改。

增加：在缺词处加一个漏词符号∧，并在此符号下面写出该加的词。

删除：把多余的词用斜线\划掉。

修改：在错词下面划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

2）只允许修改10处，多者(从第11处起)不计分。

    People are not so honest that they once were. The temptation to steal is greater than ever before ---- especial in large shops. A detective recently watched a well-dressed woman who always went into a large store on Monday mornings. One Monday, there was fewer people in the shop than usual when the woman came in, but it was easier for the detective to watch her. The woman first bought for a few small articles. After a little time, she chose one of the most expensive dressed in the shop and hand it to an assistant who wrapped it up for him as quickly as possible. Then the woman simply took the parcel and walked out to the shop with paying. When she was arrested, the detective found that the shop assistant was her daughter. The girl 'gave' her mother the free dress once a week!

根据短文理解，选择正确答案。

    On Nov.18th,1908, three men went up in a balloon. They started early in London. The headman was Augusta Gaudron, and the other two men were Tannar and Maitland. They had a big balloon and they were ready for a long way.

    Soon they heard the sea. They were carrying the usual rope, and it was hanging down from the basket of the balloon. At the end of the rope they had tied a metal box. This could hold water, or it could be empty. So they were able to change its weight. It was for use over the sea. They were also carrying some bags of sand.

    After the sun rose, the balloon went higher. It went up to 3,000 metres, and the air was very cold. The water in the balloon became ice. Snow fell past the men's basket, and they could see more snow on the ground. The men tried to throw out some more sand; but it was hard. They tried to break the icy sand with their knives, but it was not easy. The work was slow and they were still falling, so they had to drop some whole bags of sand. One of them fell on an icy lake and made a black hole in the ice.

    At last they pulled the box into the basket. It was still snowing; so they climbed to get away from the snow. They rose to 5,100 metres! Everything became icy. They were so cold that they decided to land. They came down in Poland heavily but safely. They had travelled 1,797 kilometers from London!

根据短文理解，选择正确答案。

    On Nov.18th,1908, three men went up in a balloon. They started early in London. The headman was Augusta Gaudron, and the other two men were Tannar and Maitland. They had a big balloon and they were ready for a long way.

    Soon they heard the sea. They were carrying the usual rope, and it was hanging down from the basket of the balloon. At the end of the rope they had tied a metal box. This could hold water, or it could be empty. So they were able to change its weight. It was for use over the sea. They were also carrying some bags of sand.

    After the sun rose, the balloon went higher. It went up to 3,000 metres, and the air was very cold. The water in the balloon became ice. Snow fell past the men's basket, and they could see more snow on the ground. The men tried to throw out some more sand; but it was hard. They tried to break the icy sand with their knives, but it was not easy. The work was slow and they were still falling, so they had to drop some whole bags of sand. One of them fell on an icy lake and made a black hole in the ice.

    At last they pulled the box into the basket. It was still snowing; so they climbed to get away from the snow. They rose to 5,100 metres! Everything became icy. They were so cold that they decided to land. They came down in Poland heavily but safely. They had travelled 1,797 kilometers from London!

关于摩擦力的描述，下列说法中正确的是（   ）

如图所示，质量相同的P、Q两球均处于静止状态，现用小锤打击弹性金属片，使P球沿水平方向抛出，Q球同时被松开而自由下落．则下列说法中正确的是（   ）

关于速度的描述，下列说法中正确的是（   ）

关于速度的描述，下列说法中正确的是（   ）

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Everyone can't live without money. {#blank#}1{#/blank#}However, money cannot buy everything. You can't buy the following things only relying on money you have.

Time

    Money is a tool for trade. We spend most of our time on this earth getting, spending, worrying and fantasying about money. {#blank#}2{#/blank#} Instead, money takes away your time that could have been spent playing with your children or having a long walk with your friends. When the sun sets, a day goes away from our life forever. No money has power to bring that back to life.

Self-respect

    There are a lot of examples to prove that no money can buy self-respect. {#blank#}3{#/blank#} If you are your worst enemy, gods of money can't save you from the self-destruction you add to yourself.

Health

    As I write this, I found out that one of my best friends has brain cancer, and it is in the last period. {#blank#}4{#/blank#}But no money can buy insurance for his life. We buy insurance for just about everything including our life but money can never bring life back.

Happiness

    This is controversial(有争议的). Money can buy happiness if it is spent bringing greater financial safety for the family. {#blank#}5{#/blank#} Going after money every day can never find its destination with frequent eagerness to get more .

A. Show your respect for others.

B. Self-respect is got from within.

C. Money can buy a lot of things.

D. You can't buy the time or save it in your storeroom.

E. Of course money can get him the best health care possible.

F. So you should not try your best to earn money without caring about your health.

G. But money can't buy happiness if the purpose is to make money to make other people happy.