通过使组织缺氧产生中毒的是（） A.镇静剂 B.有机磷 C.一氧化碳 D.氰化物 E

实验室制取氧气的步骤是（　　）

①检查装置气密性 ②加热并收得气体 ③停止加热④装药品、固定装置 ⑤从水槽中取出导管．

A．①②③④⑤

B．①④②③⑤

C．①④②⑤③

D．④①③②⑤

场景(一) 甲建设单位委托具有相应资质的乙招标代理机构公开招标建一幢住宅楼，2006年3月10日发出招标文件规定从2006年4月15日开始接收投标文件，截止日期为2006年5月 15日，到2006年5月10日已经收到A、B、C、D、E五家施工企业的投标文件，到15日截止共收到 6家施工企业的投标文件。甲建设单位组建了一个7人的评标委员会负责评标，B企业的标书上只有单位盖章，无法人的签字盖章。开标过程中主持人发现E企业投标文件大写金额为肆仟万元整，而小写金额为4100万元。
根据场景(一)，回答下列问题：

根据《招标投标法》规定，开标地点应当为( )的地点。

A．招标文件中预先确定

B．投标文件中预先确定

C．评标委员会确定

D．招标投标双方在开标时确定

在直肠肛门部的上段，由___________的边缘和__________的下端共同形成锯齿状的环形线，称为齿状线。

什么是前端，其主要任务是什么？

Egyptian wine has an extensive history within the history of Egyptian civilization. Grapes were not (1) to the landscape of Egypt, rather the vines themselves are (2) to have been imported from the Phoenicians, (3) the actual origins remain in (4) . What is known, is that (5) the third millennium BC, Egyptian kings of the first (6) had extensive wine cellars, and wine was used extensively in the temple ceremonies. The main (7) of wine in Egypt, took place between the king, nobles, and the priests in temple ceremonies, and is (8) by numerous painted relief’s, and other (9) evidence. The vineyards of ancient Egypt, were quite different from the modern methods of wine making today. (10) viticulture ( or wine making), ceased to (11) an exclusively ceremonial purpose, the Egyptians began to experiment with simple structures for their vines to train on, (12) found a way to train their vines so they were easy low (13) bushes, and found ways for the soil to (14) more moisture for the vines. Egyptian wine making experiments included the use of different wine presses, adding heat to the must ( the grape juice ready for fermentation) (15) make the wine sweet, and differences in vat types and materials. The (16) finished product of wine, was poured through a cloth filter, and then into earthenware jars, (17) they would be sealed with natural tar and left to (18) . The Egyptians kept accurate records of their vintages, and (19) of their wines, each jar of wine was clearly (20) with it’s own vintage, and quality.

11（）

A.act

B.serve

C.work

D.reach