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【单选题】
以下哪一项不属于直接热能回收系统的优点?A.
投资短期回报
B.
减少车间制冷系统运行成本
C.
不能用于醇水，冷却水和工艺水
D.
汽化过程无运行成本
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反馈参考答案：
举一反三
【简答题】GIS具有空间分析功能，其中()是GIS应用深化的重要标志。 A空间特征合并 B空间检索 C空间拓扑叠加分析 D空间模型分析
【单选题】The family were enjoying their dinner, so I was wondering if I had arrived at a/an ________ time. [ ]
A.
awkward
B.
prosperous
C.
flexible
D.
particular
【单选题】—That's a great dinner. ______. —Thanks, but it really only took an hour.
A.
I had never had it before!
B.
I enjoyed it very much.
C.
You must have spent all day cooking.
D.
Who cooked it?
【单选题】I _____ her invitation to the dinner party because I had a prior appointment.
A.
rejected
B.
declined
C.
refused
D.
objected
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