证券登记结算机构
参考答案：
为证券交易提供集中的登记、托管与结算服务的不以营利为目的的法人。
根据汉语意思写单词 。
1. The little dog is very sad, because it can't find its ______(主人).
2. The girl in a ______(马尾辫)over there is my sister.
3. When you want to get a job from a company, you should give them your ______(简历).
4. Tom is a ______(有礼貌)boy. He always says "hello" to his teachers.
5. I want to play tennis with my friends, but I can't find my ______(球拍).
一辆小汽车以8m/s的速度沿平直的公路匀速行驶，司机突然发现前方有障碍物，司机的反应时间不计立即刹车，刹车过程中的加速大小为2m/s²，则汽车在刹车后6秒内的位移（）
A.16m
B.12m
C.36m
D.24m
