Find out the missing words in the box in the descriptions of different weather conditions. 
It's __________ in Buenos  Aires.

snowing,   cloudy,    raining,     fair

A.楼梯、电梯间应采用框架承重
B.突出屋顶的机房应采用框架承重
C.不宜采用单跨框架结构
D.在底部，当局部荷载较大时，可采用另加砖墙承重