【简答题】We have received your firm offer.
【简答题】We offer firm for reply 11 a.m. tomorrow.
【多选题】What is a firm offer?
A.
a firm offer is a contractual obligation
B.
a firm offer cannot be revoked
C.
a firm offer is an offer made by the buyer
【单选题】We must stress that this offer is firm for three days only because of the heavy demand () the limited supplies of this velvet in stock.
【判断题】免维护密封铅酸电池存放后开路电压每节在1.2 v以下时,必须及时恢复充电,充足后方可使用。
【简答题】下图为人体的消化系统部分结构示意图,请据图回答: (1)人体消化和吸收的主要器官是图中【 】 所示结构。 (2)图中①所示器官所分泌消化液对食物中 消化起重要作用。 (3)②中的胃腺分泌的胃液含消化 的酶。 (4)营养物质被吸收后,可经血液循环运送到身体各处。被吸收的营养物质最先到达心脏的 。
【简答题】动物体最重要的消化和吸收器官是 ,实现气体交换的结构和功能单位是