( )两种形式为目前国内外大面积用于工程的冰蓄冷空调系统中的蓄冰装置。
A.冰晶和盘管 B.冰球和盘管C.优太盐和冰泥 D.制冰滑落式和优太盐
参考答案:B
Mr.Jones, _______ a great loss last year, has no courage to go on with his business. [ ]
A. suffering
B. to suffer
C. suffered
D. having suffered
基本农田保护包含了三层含义