题目

完形填空 Growing up in a military family, I moved a lot.I mostly went to 1 with other kids whose parents were also in themilitary. But when my dad 2from the Marines after twenty years ofservice, I found myself 3a civilian school with twelve-year-oldwho shared no similar life experience with me. I was a stranger in a strange land. Everyone inmy class had grown up together, and they had no 4tospare for a newcomer. I wore different clothes, had different thoughts, andspoke with an accent. I 5for the first few weeks of school. I hadno friends, no activities, and no 6of a bright future. To deal先阅读，再作出选择：汽车在行驶过程中，发动机的功率为P，牵引力为F，汽车行驶的速度为v，这三者之间的关系为P=Fv。当汽车爬坡时，驾驶员的操作总是加大油门同时将变速器换为低档。加大油门是使发动机发挥最大的功率，换为低档是为了减慢车速。那么，在爬坡时减慢车速的目的是（　 ）.A．保证安全　　　　　　 B．省油C．增大发动机的牵引力　　D．以上说法均正确