电器触头磨损形式不正确的是（）。
A、机械磨损
B、人为磨损
C、化学磨损
D、电磨损
参考答案：B
设a=log0.70.8，b=log1.10.9，c=1.10.9，那么[ ]
A.a＜b＜c
B.a＜c＜b
C.b＜a＜c
D.c＜a＜b
— Where did you meet him for the first time?
— It was in WL International Middle School ______ we studied together. [ ]
A. that
B. which
C. where
D. what
