题干

两列火车如图所示,西子号列车上的乘客看到和谐号列车正在向东行驶,如果以地面为参照物,则下列说法正确的是(   )

A:若西子号向东行驶,则和谐号一定静止

B:若西子号向东行驶,则和谐号一定也向东行驶

C:若西子号静止,则和谐号可能向西行驶

D:若两车都向西行驶,则西子号行驶得较慢

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答案(点此获取答案解析)

B

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    According to a new Ministry of Education (教育部) survey, student safety has become a big problem. Nearly 50 percent of students say they are worried about robbery on the way to and from school. Now in many big cities in China, some school has taught an unusual lesson: self– protection. Students like this lesson as there are no exams or boring classes. And they can learn how to save lives and know how to stop danger before it really happens.

    Chen Haoyu, a teacher at Beijing No.25 Middle School and a self–protection expert, gives young students advice on how to deal with danger.

    If you are robbed

    Keep calm. If you cannot cry for help or run away, give the robber your money. Try to remember what the robber looks like and tell the police.

    If you are in a traffic accident

    If you are hurt by a car, take down the car number; if it is a bicycle, try to contact your parents before you let the rider go. This is because you don't know how seriously you are hurt.

    If it is raining hard and there is lightning

    Don't stay in high places and keep away from trees.

    When there is a fire

    Get away as fast as you can. Put wet things on your body and try and find an exit. Do not take the lift!

    If someone is drowning(溺水)

    If you can't swim, don't get into the water. Cry out for help.

    Remember that danger is never as far away as you think. Take care of yourself at all times!