合同约定由买受人在一定期限内试用标的物,并以买受人认可为合同生效的条件。合同法理论称这类合同为()
A. 试用买卖合同
B. 样品买卖合同
C. 分期付款买卖合同
D. 竞争缔约买卖合同
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The general’s command was that ______________________________. (士兵们离开自己的营地去执行更加重要的任务)
Professor Smith succeeded in _______________________________. (通过将其类比成水的运动来解释光的运动)
When the dog reaches home, he ______ but it proves in vain (徒劳).
The butcher is very much surprised to see ______.