平度市的天柱山摩崖石刻是省级重点文物保护单位。
A. 正确
B. 错误
The （） can tell us how much heat we can get from the burning of an oil.
A. viscosity
B. flash point
C. cetane number
D. calorific value
首先将“言行一致”作为道德修养问题加以说明的是（）。
A. 老子
B. 庄子
C. 孔子
D. 孟子
A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.
A. high pressure liquid line
B. low pressure liquid line
C. high pressure vapor line
D. low pressure vapor line
微信支付 
支付宝支付