问题
问答题
在匀变速直线运动中，中间时刻的速度
与中间位置的速度
的大小关系如何？
答案
无论是匀加速直线运动还是匀减速直线运动，都是
。这一点可以由v-t图象中明显看出，也可以分别对匀加速或匀减速直线运动采用赋值法判断其大小关系。
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在匀变速直线运动中，中间时刻的速度与中间位置的速度的大小关系如何？
无论是匀加速直线运动还是匀减速直线运动，都是。这一点可以由v-t图象中明显看出，也可以分别对匀加速或匀减速直线运动采用赋值法判断其大小关系。
| Many people have two accounts in a bank, A savings account and a checking account. When people deposit money in a savings account, it earns interest. They can withdraw their savings at any time, unless it is a special notice account. A special notice account earns higher interest, but you must give the bank 90 days notice before withdrawing money from it. People use checking accounts for convenience. They deposit some money and write checks when they want to pay bills. This way they do not have to send cash through the mail. They do not have to carry a lot of cash with them, for they can write a check instead. At the end of the month, the bank returns the checks they have written and have been cashed. The bank also sends a statement of all the checks used. That way people have a record of how much money they have spent that month. |
People using savings accounts can withdraw their savings whenever they like.
A．
| A. Right |
B．
| B. Wrong |
C．
| C. Doesn’t say |