题干

下列事实的微观解释错误的是

选项

事实

微观解释

A

墙内开花墙外香

分子在不断运动

B

气体易被压缩

气体分子体积小

C

氯化钠的水溶液可以导电

含有自由移动的离子

D

水电解生成氢气和氧气

分子分裂成原子,原子重新结合成新分子

(   )

A:A  

B:B  

C:C  

D:D

上一题 下一题 0.0难度 选择题 更新时间:2017-07-24 06:55:34

答案(点此获取答案解析)

B

同类题1

阅读理解

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    We have a wide variety of activities and sports to choose from: fishing, dance, basketball, soccer, baseball, and tennis. Boys and girls, aged 8-16, can customize their own schedules in our 2, 3, 4 or 6 week summer camp session for kids.

    The aim of Camp All-Star is to develop athletic skills, encourage abilities in leadership, fair play and team work, and provide a fun, rewarding and memorable summer sports camp experience. Our staff have the experience and qualified training necessary to ensure that your child has a successful, memorable and enjoyable time at our summer camp.

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同类题2

阅读理解

    A few weeks ago, I called an Uber to take me to the Boston airport for a flight home for the holidays. As I slid into the back seat of the car, the warm intonations(语调)of the driver's accent washed over me in a familiar way.

    I learned that he was a recent West African immigrant with a few young children, working hard to provide for his family. I could relate: I am the daughter of two Ethiopian immigrants who made their share of sacrifices to ensure my success. I told him I was on a college break and headed home to visit my parents. That's how he found out I go to Harvard. An approving eye glinted(闪烁)at me in the rearview window, and quickly, we crossed the boundaries of rider and driver. I became his daughter, all grown up – the product of his sacrifice.

    And then came the fateful question: “What do you study?” I answered “history and literature” and the pride in his voice faded, as I knew it might. I didn't even get to add “and African-American studies” before he cut in, his voice thick with disappointment. “All that work to get into Harvard, and you study history?”

    Here I was, his daughter, squandering the biggest opportunity of her life. He went on to deliver the age-old lecture that all immigrant kids know. We are to become doctors (or lawyers, if our parents are being generous) – to make money and send money back home. The unspoken demand, made across generations, which my Uber driver laid out plainly, is simple: Fulfill your role in the narrative(故事)of upward mobility so your children can do the same.

    I used to feel anxious and backed into a corner by the questioning, but now as a junior in college, I'm grateful for their support more than anything. This holiday season, I've promised myself I won't get annoyed at their inquiries. I won't defensively respond with “but I plan to go to law school!” when I get unrequested advice. I'll just smile and nod, and enjoy the warmth of the occasion.