题目

从卫星云图上，能清晰地看到台风的中心位置及其移动方向。卫星云图来自（    ） A．RS技术 B．GIS技术C．GPS技术   D．观测资料 答案：AYou’d better take the map with you ________ you won’t get lost.A. as long as B. as soon as C. now that D. so that