R22含水时会出现“冰堵”现象，要求在系统内加装干燥装置，在充注R22以前进行严格的（）。
参考答案：干燥处理
三角形的面积一定，它的底和高成反比例．______．
To his disappointment, the opinion he had stuck _____ out wrong.[ ]
A. to turn
B. to turning
C. to turned
D. to be turned
