活动面的热量收支方程:昼()夜()
参考答案:R-P-B-LE=0、–R+P+B+LE=0
-----Who has made a mess in my room?
-----Who else it but your naughty son?
A.could do
B.could have done
C.did
D.had done
水准路线按布设形式分为()
A.闭合水准路线
B.附合水准路
C.支水准路线
D.间曲线
E.助曲线