高压硅整流器的油温超过（）就跳闸。
参考答案：85度
思维最基本的智力操作手段是______。
A．比较和分类B．分析和综合 C．抽象与概括 D．具体化和系统化
–I phoned you at 5:00 yesterday afternoon, but nobody answered me.
-Sorry. I ______ the flowers in the garden at that time.
A．am watering
B．was watering
C．water
D．will water
