题目

对于秒摆下述说法正确的是 A．摆长缩短为原来的四分之一时，频率是1HzB．摆球质量减小到原来的四分之一时，周期是4sC．振幅减为原来的四分之一时，周期是2sD．如果重力加速度减为原来的四分之一时，频率为0.25Hz 答案：ACDⅧ. 任务型阅读          People go to work in different (不同的) ways. Some people go to work on foot because they live near their workplaces. Some people go to work by bike because they live farther away,or they like riding bikes. They think it's good for their health. Today more people have private (私人的) cars,so they can go to work in their cars. In the south of China,many people even go to work by boat because water is around their houses. Will people go to work by plane? I think so,if necessary (如果必要的话) . 根据短文内容，判断正(T) 误(T) 。() 1. All people like to go to work by bike.() 2. Some people think it's good to go to work by bike.() 3. Today more people drive to work.() 4. In the north of China,many people go to work by boat.() 5. The writer thinks some people will go to work by plane if necessary.