An electric heater built into some smaller diesel engines is used to ().
A. raise lube oil viscosity for easier starting in cold weather
B. increase air inlet temperature
C. increase compression ratio
D. increase jacket water temperature for easier starting in cold weather
查看答案
家用中央空调的主机和通风管都密封安装,维修麻烦吗?
各网(省)局统一管理直接管辖范围内微机继电保护装置的程序,对同一型号的保护应使用相同的程序,更改程序应下发程序通知单。
A. 正确
B. 错误