双电层紧密层
参考答案：配衡离子受定位离子的静电作用，在矿物表面形成的单层吸附层。
在___里填上＞、＜或=．
7d.9÷0.9______7d.9；
6.7×0.7______6.7；
m.dd÷d.d______m.dd；
w.dm×1______&n十sp;w.dm．
— What were you doing when I phoned you yesterdayevening?
— I ____ just finished my homework and I ____ to watch TV. [ ]
A. have; am going
B. have; was going
C. had; was going
D. had; am going
