S11-800∕10为节能型变压器型号,其中800表示()
A.额定容量
B.低压侧额流
C.高压侧额流
D.额定电压
参考答案:A
The heat from the sun can't escape because of too much ______. [ ]
A. ozone
B. oxygen
C. carbon dioxide
D. radiation
要求:全面,有条理,有层次。