题干

按公安部和市局春运期间开展整治酒后驾驶违法行为集中统一行动的安排部署,我市公安局交巡警总队分别于2月7日、12日、16日,开展全市范围内的酒后驾驶违法行为集中整治行动。如图交巡警对醉酒驾驶者正在进行酒精测试,其右图是该酒精测试仪的原理图。图中酒精气体传感器的电阻的倒数与酒精气体的浓度成正比,如果测试到的酒精气体浓度越大,那么(    )

A:传感器的电阻越大

B:电压表的示数越大

C:传感器两端的电压越大

D:通过传感器的电流越小

上一题 下一题 0.0难度 选择题 更新时间:2018-02-13 09:53:13

答案(点此获取答案解析)

B

同类题3

阅读理解

    Children like to imagine they are someone else in a game. As a parent you might never guess how it can benefit your child. It helps your child:

Develop Social Skills

    As children play pretend games, they explore relationships between family members, friends and coworkers and learn more about how people interact. Playing doctor, they imagine how physicians care for their patients. Imaginative play helps of a game or to lose a pet, they are better able to help those in need. They become more willing to play fair, to share, and to cooperate.

Build Self-confidence

    Children have very little control over their lives. Imagining oneself as a builder of skyscrapers or a super hero defending the planet is inspiring to children. It helps them develop confidence in their abilities and their potential.

Promote Intellectual Growth

    Using imagination is the beginning of abstract thought. Children who can see a king's castle in a mound of sand or a delicious dinner in a mud pie are learning to think symbolically(象征性地). This skill is important in school where a child will have to learn that numbers symbolize groups of objects, letters symbolize sounds, and so on.

Practice Language Skills

    Kids who pretend with their friends do a lot of talking. This helps increase their vocabulary, improve sentence structure and develop communication skills.

Get Rid of Fears

    Pretending can help children get rid of their fears and worries. When children role-play the big, bad monsters under the bed, they gain a sense of control over him and he doesn't seem quite so big or so bad.