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单项选择题

葡萄糖在水溶液中的主要存在形式是β-D-（+）-吡喃葡萄糖
A、正确
B、错误

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单项选择题

A、
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单项选择题
【单选题】Which of the following statement on firm offer is NOT true? ________ A.
A firm offer usually contains specific information, such as, an exact description of goods, payment, delivery, shipment, and validity etc. B.
A firm offer is usually explicit and complete in quotations and without any announcement, such as, “subject to our final confirmation” etc. C.
A firm offer creates a power of acceptance, permitting the offeree by accepting the offer, to transform the offer’s promise into a contractual obligation. D.
After a firm offer has been accepted, it can be withdrawn.
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