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问题 选择题

人从发现情况到采取相应行动经过的时间叫反应时间。我们可以采用下面的实验测出自己的反应时间。请一位同学用两个手指捏住木尺顶端，你用一只手在木尺下部做握住木尺的准备，但手的任何部位在开始时都不要碰到木尺。当看到那位同学放开手时，你立即握住木尺，根据木尺下降的高度，可以算出你的反应时间。若某次测量中木尺下降了约11 cm，由此可知此次你的反应时间约为

A．0.2 s

B．0.15 s

C．0.1 s

D．0.05 s

答案

答案：B

题目分析：根据自由落体运动的规律，有，其中h="0.11" m，代入可得此人的反应时间约为0.15 s，选项B正确。

阅读理解
请阅读下面这篇文章，根据所提供的信息，完成信息卡，把答案写在答题卡指定的位置上。
Life in China
Every day, News on TV, radio and online brings you stories from across China. Have you got a story about life in China? If you do, please put your story here.

Since the winter last year, the haze(雾霾) has happened a lot of times. It has done great harm(伤害) to our daily life. More and more people have to go to see the doctor because the serious disease caused by the haze. Many traffic accidents happened and quite a lot of flights have to be put off just because of the haze weather. On Oct.30, 2013, in 16-car chain collision (连环相撞) on the highway in Tangshan, many people were hurt and some even died. Beijing International Airport canceled or put off nearly 76 flights on Oct.6, 2013 as the result of the weather. (Wu Hai, Shantou)
It’s reported that 293 pedestrians(行人)die of traffic accidents every day in China. I myself ever experienced a very terrible accident.

Early last Thursday morning, I was walking on my way to school as usual. A little boy ran past me. He ran so fast when crossing the street that he didn’t notice a speeding car came round the corner. I was scared and shouted to him to stop, but it was too late. The boy was knocked down by the car. I hurried to the boy, crying for help. The boy was taken to the hospital as soon as the policemen and doctors arrived. Later, I learned the boy died because he lost too much blood.(Li Lan, Guangzhou)
Information card
Main ideas of the two stories
The first story is about air pollution, the second one is about 小题1:____.
Harm that the haze does to our daily life
It may cause 小题2:__and traffic accidents.
Many flights have to 小题3:___.
The number that pedestrians die of traffic accident every day
小题4:____
The reason why the little boy died
He小题5:__ and was hit by a speeding car.
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填空题

根据下图回答问题，并写出有关反应的化学方程式和电极反应式：

(1)此装置为_______池，其 中Fe为_______极。

(2)Fe棒上发生反应的反应式为________________。

(3)Pt极上的电极反应式为________________。

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