雷达干扰可分为（）。
A.压制性干扰
B.欺骗性干扰
C.有源干扰
D.无源干扰
参考答案：C, D
It’s helpful to put children in a situation ____they can see themselves differently.
A．what
B．which
C．where
D．As
按从小到大排列：
3吨、2700千克、3600克．
