某同学在沿直线行驶的火车车厢内向窗外水平抛出一个物体，抛出方向与火车前进方向垂直。下图中线段AB表示物体运动轨迹在水平面上的投影，若不计空气阻力，则其中正确的是（  ）

如图所示是两种不同的过山车过最高点时的情形,图甲情形中,乘客经过轨道最高点时头朝上,图乙情形中,乘客经过轨道最高点时头朝下,假设两种圆轨道的半径均为 $\text{R}$ 。下列说法正确的是（   ）

我会加偏旁成新字，再组词

寸 ____  ____    庄 ____  ____

巴 ____  ____    吾 ____  ____

已知M是$e^x+e^{-x}$的最小值，N＝$\frac{2\tan 22.5°}{1-{\tan }^{2}22.5°}$，则下图所示程序框图输出的S为（   ）

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。
    Once there was an old woman who liked to make cookies(曲奇饼).She didn't have1to share them with，so she always gave them away to the children in the neighborhood.This continued for several years and the cookies became quite famous，2at Christmas time.The parents began to like the cookies as much as the children did，and the old woman's kitchen became very busy, so the children came to3.
Then one Christmas the old woman became ill.There were no cookies，and there was no money to pay the doctor.The children were very4.Later they had a(n)5 ， that is，to make cookies from the old woman's recipe(食谱).So the children 6a cookie store.Soon they had a very good cookie business and got7money to Pay the doctor.
    After the old woman got well，she was asked to become the manager(经理)of the store，selling special cookies8all the holidays of the year.9the old woman died，the children，now grown up，kept the cookie business alive(有生气的)in her name.
    Maybe life is like a Christmas cookie.The more you10it with your friends, the more you may enjoy it.