______with several kinds of flowers and plants, our school looks much more beautiful．

A．To be planted

B．Planting

C．Having planted

D．Planted

蒸发器“溢满”后，导致液态制冷剂进入压缩机而出现“（）”现象，损坏压缩机。

A.虹吸

B.折射

C.结晶

D.液击