1871年，达尔文出版了哪部著作论述人来在生物界中的位置，人与高等动物的亲缘关系及其

某施工企业投标中标一住宅小区工程的施工任务，并与招标人订立了书面合同，合同总额2000万元。由于工期紧，将其中部分工程的施工任务转给了其他施工企业，并从中获利。对此，该施工企业将面临的法律后果不包括（）。

A.被处以10万元以上20万元以下的罚款

B.按规定被没收非法所得

C.被责令停业整顿甚至被吊销营业执照

D.企业法人被刑事处罚

Ade, a keen pottery collector, saw a notice for an auction of Bede pottery in the January edition of Antiques News. He travelled 300 kilometres to attend the auction in order to bid for a particularly rare example of Bede pottery, specifically mentioned in the lists of items to be auctioned. However, when he got to the auction site he found a notice outside, stating that the auction had been cancelled. Ade went into a nearby antique shop and saw an example of the type of pottery he had come to bid for. The price ticket stated that it was ￡500, but Ade said he was only willing to pay ￡350 for it. The shopkeeper, Chip, said he would sell it for ￡400 and as Ade said he would like time to think about it over lunch, Chip agreed not to sell it before Ade returned.However, when Ade returned to buy the pottery, he found that Chip had already sold it to someone else, who had paid ￡450 for it.Required:In the context of contract law, advise Ade whether he can take action against:

(a) the auctioneers, for the expense of his travel to the auction; and

计算题：某台1000t/h燃煤锅炉额定负荷时总燃烧空气量为1233t/h，根据DL435－91《火电厂煤粉锅炉燃烧室防爆规程》规定，从锅炉启动开始不能低于25%额定通风量，计算锅炉通风量极低保护的定值。

有三个关系R、S和T如下：

R
A	B	C
a	1	2
b	2	1
c	3	1

S
A	B	C
a	1	2
b	2	1

T
A	B	C
c	3	1

则由关系R和S得到关系T的操作是______。

A．自然连接
B．差
C．交
D．并

凡经大修的传感器，必须经（）后方可下井使用。

A、通电试验合格

B、校正

C、鉴定

D、计量检定合格