推土机在斜坡横向推土时，斜坡不能超过多少度？
参考答案：
斜坡不能超过30度。
The number of the cars owned by Shenyangers is reported to have been over 670,000 already and ______ about 275 cars a day.[ ]
A．has increased
B．is increasing
C．has increased by
D．is increasing by
如果DCS长时间黑屏时，装置应采取（）处理。
A.降量
B.降温
C.改闭路循环
D.紧急停车
already and ______ about 275 cars a day.[ ]