整体道床轨道系指由（）组成的轨道结构。

淘气8：30到校学习，下午4：25放学回家，他全天在校______时______分．

铅中毒主要机制是（）

A.杀死细胞

B.导致体内部分酶的活性丧失

C.呼吸抑制

D.心跳加快

E.神经抑制

ZAO Snack is a company that operates a popular chain of coffee shops in a large city. The company has grown rapidly but is now looking for additional fi nance to enable further expansion to be achieved.The three main shareholders have approached Vera, a wealthy entrepreneur, to encourage her to invest in the company.Vera has been impressed by the company and the vision of its owners, but has stated that she will only invest subject to certain conditions. Vera has informed the main shareholders that in order to provide the fi nance that is sought by them, she wants to take a minimum equity stake in the company of 10%. She also wants to be guaranteed a minimum annual dividend of 10%, which she notes from the most recent fi nancial accounts and projections would be easily affordable to the company.The main shareholders of the company have agreed to transfer 10% of the total shares in the company to Vera by decreasing their own shareholdings. However, they are concerned about the potential implications of offering her a 10% stake in the company, the minimum fi nancial stake that she requires and the minimum return that she wants the company to provide.Required:

(a) Explain the impact of Vera acquiring a 10% stake in the equity of the company in respect of her ability to infl uence future decisions and actions proposed by the shareholders. (4 marks)

“人们创造自己的历史。”这一命题表明( )。

A．人是社会的主体

B．历史是由追求自己目的的人的活动构成的

C．历史发展方向是由人自觉选定的

D．历史规律实现于人的自觉活动之中

提高总传热系数K的途径为：提高流体的（）、增强流体的（）、采用（）换热器。