题目

如图所示，有两架歼-20隐形战斗机正在演习驱逐侵犯我国领空的敌机。我方飞机甲先是发出无线电警告，后近距离同步（与敌机速度相同）威慑驱赶敌机，我方飞机乙全程变距监控，预防意外。下列说法正确的是（） A . 以云为参照物，三架飞机都静止 B . 以飞机甲为参照物，敌机静止 C . 以飞机乙为参照物，敌机静止 D . 以敌机为参照物，我方飞机均静止Many of us enjoy watching animals in the world. But do you know they can teach us?Geese (雁)，for example, teach a very good lesson about _______. In the fall, Canada geese fly to the warm south to ______ Canada’s cold winter. They lift off in no order. Yet _____ they form a V shape, with one bird leading the group.This V shape allows geese to ______ energy. When the front bird moves its wings up and down, the resulting force of the air lifts the next one. This continues down the line. The bird _______ has the hardest job. When it gets _______, it moves behind, and another bird moves into the lead. By sharing the role, the group can travel great distances. Geese flying in a V shape can fly 70 percent farther without ______ than birds flying alone.During the long flying journey, geese communicate with one another. They honk (鸣叫）to ______ the birds up front to keep up the speed. They also cheer each other up ______ working toward a common goal.What have we learned from the lovely geese’s experience and skills?______ together! Whether it is our personal lives or our jobs, we need other people. We need the spirit of teamwork!1.A. experience B. success C. friendship D. teamwork2.A. look for B. get away from C. wait for D. walk away from3.A. busily B. quickly C. bravely D. suddenly4.A. save B. waste C. create D. lose5.A. in front B. at the back C. in the middle D. on the left6.A. bored B. tired C. hungry D. thirsty7.A. rest B. sleep C. excuse D. result8.A. lead B. lift C. teach D. encourage9.A. until B. after C. while D. before10.A. Play B. Travel C. Live D. Work