感染性蛔虫卵在土壤中发育的适宜温度是()
A.37℃
B.31℃
C.21~30℃
D.15℃
E.10℃
参考答案:C
— We are going to have a barbecue in Nanshan Park tomorrow.
— _____[ ]
A. Have a good time!
B. Congratulations!
C. Hurt's true!
D. That's nothing!
简述重质油油尺和油温的计算方法?