要打开冲压空气活门必须()
A、将PRESSN电门放OVRD位
B、将RAM电门放ARM位
C、将DUMP活门手柄放OPEN位
D、A和C
参考答案:C
The one million people of the city,________ thought little of these events , _______to bed as usual that night .
A.which…going
B.where…went
C.who…went
D.who… going
学生已有的生活经验和数学概念是学生构建数学概念能力的要素之一。