题目

Knowing the best way to study will help you to be a better student. By using your time properly, you can do your homework more quickly. Learning to study is not difficult. The first thing to remember is that you must be willing to learn. It doesn’t mean that you must always like the subject. It does mean, however, that you must be willing to do whatever is necessary to learn. Try to understand why it is important and how it will help you now and later to do and learn other things. Knowing mathematics facts will be useful in your whole life. Knowing how to spell makes any kind of writi5．某质点做匀变速直线运动的位移x与时间t的关系式为x=5t+t2（各物理量均采用国际单位制单位），则该质点（　　）A．第2s内的位移是14mB．前2s内的平均速度是8m/sC．任意相邻的1s内的位移差都是1mD．任意1s内的速度增量都是2m/s