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问题 选择题

2010年青海玉树发生特大地震灾害，有些人长时间被深埋废墟但最终获救。这些幸存者当时生命得以延续的最必需的营养物质是[ ]

A．糖类

B．蛋白质

C．维生素

D．水

答案

D

完形填空

Every day, in all kinds of weather, a lot of men and women go jogging (running slowly). Why has jogging become so popular? Most people start jogging___小题1:___they hear it is a very good form of exercise. Jogging makes one’s heart strong and helps people control their weight or stay slim. If you keep jogging regularly, you needn’t take pills__小题2:__ skip meals to lose weight. Jogging can__小题3:__make you feel better about yourself.

Donald Robbins,___小题4:__ is 42 years old and works in an office, began jogging a few years ago because he felt he was overweight. At first he could only run about 300 meters,__小题5:__two years later, he ran a marathon- over 42 kilometers.

Do you jog? If you do, be sure to ask your doctor for advice. Does jogging cost much? Almost__小题6:__. But __小题7:__ is very important to have a good pair of shoes that are made especially for jogging. If not, when you run on hard ground for a long time it may cause your feet__小题8:__ hurt.
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单项选择题

关于提速道岔尖轨，（）的说法是正确的。

A.直向和侧向尖轨均为直线型

B.直向和侧向尖轨均为曲线型

C.直向尖轨为曲线型，侧向尖轨为直线型

D.直向尖轨为直线型，侧向尖轨为曲线型
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