选择题：当打开一个装有液态空气的容器盖，并将一根燃着的木条置于容器口上方，观察到的现象是

题型：阅读理解

Five years ago, I met her in a shopping center. I was walking through the shop when I saw her. Then she came back to my house with me. After that, we became friends.

Once she had to go into hospital to have an operation(手术) on her leg. I was worried about her and looked after her every day. I made breakfast for her. I was not good at cooking, but she never complained. I also helped her take showers.

I have no idea why we can be good friends, because she is quite different from me. I like writing, reading and playing computer games. But she loves outdoor activities. She likes playing balls best. She also loves sleeping.

She will run all around the house to lick(舔) my face if someone shouts “Kiss for Dad.” That is the only name she knows me by—Dad, though I call her by many names—Pickle, Missile and Little. But her real name is Pixar. This week she turns seven years old.

小题1:Where did the writer met Pixar?

A．On the street.

B．In a hospital.

C．In a shopping center.

D．In an animal center.小题2:Pixar was years old when the writer met her.

A．two

B．five

C．seven

D．one小题3:What can we learn from the passage?

A．Pixar once had an operation on her head.

B．Pixar doesn’t like playing outside.

C．Pixar is the writer’s dog.

D．Pixar calls the writer “Dad” every day.小题4:What’s the best title for the passage?

A．How to Make Friends

B．My Good Friend

C．Strange experience.

D．How to Be a Good Friend

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题型：计算题

在游乐节目中，选手需要于借助悬挂在高处的绳飞越到水面的浮台上，小舒和小程观看后对此进行了讨论。如图所示，他们将选手简化为质量m=60kg的质点，选手抓住绳由静止开始摆动，此时绳与竖直方向夹角=53^。，绳的悬挂点O距水面的高度为H=3m。（不考虑空气阻力和绳的质量，浮台露出水面的高度不计，水足够深。取重力加速度，，）