精密着陆雷达也就是三坐标雷达的优点是（）。
A.简单
B.适应性强
C.机动性好（雷达车）
D.场地气象要求低
参考答案：A, B, C, D
用括号内所给单词的适当形式填空。
1. Have you _____ (do) anything to keep the water clean?
2. Project Hope has built schools and _____ (library).
3. Our city _____ _____ (change) a lot since 2001.
4. The girl left the classroom without _____ (say) anything.
5. All of us want to know how _____ _____ (play) computer games.
气厥虚者治疗时所用方药是
A．生脉注射液
B．五磨饮子
C．参附青注射液
D．通关散
E．四味回阳饮
r games.