稀碱液的凝点是（）℃左右。
参考答案：-5
The number of farmers with Internet access has dramatically increased, _____the way farmers do
business.[ ]
A. having changed
B. to change
C. changing
D. changed
旋压密封式制动缸缸体腐蚀深度大于（）时更换。
A.1mm
B.2mm
C.3mm
D.4mm
