实行工程量清单计价的工程，宜采用（）合同。 A.总价 B.单价合同 C.可调价 D.

某单位围墙外面的公路围成了边长为300米的正方形，甲乙两人分别从两个对角沿逆时针同时出发，如果甲每分钟走90米，乙每分钟走70米，那么经过多少时问甲才能看到乙( )

A．16分40秒

B．16分

C．15分

D．14分40秒

在一个关系二维表中，主属性是指（　　　）

A．非主码

B．候选码

C．主码

D．非候选码

Berger owed debts to several persons including Salomon. Thabos & Co bought Berger’s business, and called a meeting of Berger’s creditors. At the meeting, Thabos & Co promised to pay all the creditors, including Salomon, whatever amount Berger owed them in full. Berger owed Salomon R5,000 but Thabos & Co thought it was only R3,500 and, in their own mind, were agreeing to pay only that amount. Salomon submitted a claim for R5,000 but Thabos & Co refused to pay more than R3,500.Required:Advise Salomon. (10 marks)

非公开发行股票的发行对象为境外战略投资者的，应当经国务院相关部门事先批准。()

大便先干后溏属于

A．脾气虚弱
B．肝郁脾虚
C．肝胃不和
D．脾肾阳虚
E．大肠湿热