阅读下列短文，要求从中提出两个与物理知识相关的问题，并解释：_爱下问搜题

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问题问答题

阅读下列短文，要求从中提出两个与物理知识相关的问题，并解释：

小刚中午放学了，天气炎热，他从路边买了一支冰棍，剥开包装纸，冰棍冒着“白气”，吃了冰棍以后，凉快多了，回到家，打开风扇的高挡，更凉快了…

（1）______ 解释：______．

（2）______ 解释：______．

答案

（1）“白气”是如何形成的？解释：“白气”是由空气中的水蒸气遇冷液化形成的．

（2）吃了冰棍以后，为什么凉快多了？解释：冰棍吃到嘴里，发生了熔化，熔化要吸热．

或：打开风扇的高档，为什么感觉更凉快了？解释：打开风扇的高档，空气流速加快，加快蒸发吸热．

实验题

如图是人体心脏结构示意图，据图回答下列问题：

（1）写出下列番号代表的结构名称。2、 3、 6、 7、

（2）血液在心脏中只能从心房流向心室，从心室流向________ _。

完形填空

He lost his arms in an accident that claimed his father's life—who was the main 21  of support for the family. He had to 22  the arms of his younger brother. For the sake of taking care of him, his younger brother became his 23 ,never leaving him alone for years. Except for writing with his toes, he was completely unable to do 24   in his life.
One late night, his younger brother accompanied him into the toilet and then went back to the dorm to 25 . But being so 26 , his younger brother fell asleep, leaving him on the toilet for two hours. As the two brothers grew up together, they had their share of problems and they would often 27 . Then one day, his younger brother wanted to live 28  from him, living his own life, as many normal people do. So he was 29 and didn't know what to do.
A 30  misfortune befell a girl, too. One night her mother, who suffered from mental illness，31 . So her father went out looking for her mother, leaving her alone at home. She tried to prepare a 32  for her parents, only to overturn the stove, 33  in a fire which took her hands away.
Though her elder sister who was studying in another city, showed her 34  to take care of her, she was determined to be completely 35 . At school, she always studied hard.
One day, the boy and the girl were both invited to appear on a television interview program. They both were asked to write something on a piece of paper with their toes. The boy wrote: My younger brother's arms are my arms；36   the girl wrote: Broken wings, flying heart.
Disasters can 37  at any time. How you handlemisfortune when confronted with it is the true test of your character. If you choose only to complain and 38  from the ordeal(磨难), it will always follow you wherever you go. But if you decide to be 39 , the hardship will turn out to be a(n) 40    on which new hopes will arise.

B．differently

D．thoughtfully

B．heartbroken

C．kind-hearted

B．disappeared

A．willingness

C．contribution

A．independent