单级氨压缩制冷工艺中制冷剂的工作循环过程为（）。A.汽化→冷凝→节流→压缩 B.压缩

口甜而粘腻者，常提示

A．脾虚湿阻

B．痰饮内停

C．饮食停滞

D．肝胆湿热

E．脾胃湿热

Passage One

Which parts of the elephant’s body are NOT used by the passenger in climbing onto the elephant

A．The front part of either leg or the ear.

B．Its front leg and the ear.

C．The backside and the tail.

D．Its back leg and the tusk.

戏剧艺术

中速磨具有设备投资高，结构复杂，对煤质要求严格，密封性好，耗电量低，运行平稳，噪音（）等特点。