厨房里涉及很多物理知识：（1）打开醋瓶闻到醋香，这是________爱下问搜题

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问题填空题

厨房里涉及很多物理知识：

（1）打开醋瓶闻到醋香，这是________ 现象；

（2）排风扇工作时将电能转化为________ 能；

（3）筷子实际上是一种________ 杠杆（填“省力”或“费力”）；

（4）光滑墙壁上的吸盘式挂钩是在________ 的作用下被压在墙壁上的。

答案

（1）扩散（或分子无规则运动，或分子热运动）

（2）机械

（3）费力

（4）大气压（大气压强）

完形填空

I met Billy the last summer before college. He was handsome and his irreverence(玩世不恭) was    to me. We liked each other the first instant we met.       , I was a straight A student and my parents had high hopes for me to     an Ivy League (常春藤联盟) school. Billy did not concentrate all his attention        his study and school life. However, we were in love --- so        teenager love. I still remember we had a plan for prom(舞会). It was understood that we had       about where we would dance and drink and party together.
This meant one thing to my parents---panic. And it grew as the       letters began to roll in. Of the eleven schools I applied to, nine accepted me. And one of them was Brown University---the Ivy League     in 1770 in historic Providence, Rhode Island.
There was no         that I was drawn to Brown, but Billy (who had joined the army) was      down south and I had offers      for me there, too. I was torn between my love for him and my family      .
One week        the start of school, my mother had a talk with me. She said I was eighteen years old and I had a        to make--- one that went        beyond the choice of       to attend university.
In August, I      and drove north to Providence. It took several months to     that my life was moving on in a way that was completely different from Billy’s. Brown changed my life, opening doors and giving me the       I now use to think, to learn and to write. Life is always about       it seems, and the older I get, the more I understand this. Still, there are times when I think of Billy because he taught me about love.

A．Unfortunately

A．description

C．application

A．constructed

D．expectation

C．opportunities

问答题简答题

二级消防员化学防护服装为连体式结构，与外置式正压式消防空气呼吸器配合使用，主要由哪些部分等构成？