单项选择题
氨是应用较广的中温制冷剂,标准沸点为(),凝固点为()。
A.-33.3℃,-77.9℃
B.33.3℃,-77.9℃
C.33.3℃,-33.3℃
D.-77.9℃,-33.3℃
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单项选择题
A.-33.3℃,-77.9℃
B.33.3℃,-77.9℃
C.33.3℃,-33.3℃
D.-77.9℃,-33.3℃
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