把一个圆柱形木头削成一个最大的圆锥，削去部分的体积是8分米3，这个圆锥的体积是（

患者，女性，25岁，右下后牙剧痛3天。检查见患者面色苍白，精神疲惫，面大面积龋坏，探诊无痛感，叩痛明显，松动Ⅱ度，温度测试无反应。

进一步的检查应是（）。

A.牙周袋探诊

B.实验性备洞

C.选择性麻醉

D.X线片检查

E.牙髓电活力测验

Chu, a suitably qualified person, was appointed as the company secretary of Do plc. Since his appointment, Chu has entered into the following contracts in the name of Do plc:(a) an extremely expensive, long-term contract with Ex plc for the maintenance of Do plc’s photocopiers;(b) an agreement to hire a car from Far plc which Chu used for his own, non-business related purposes;(c) an agreement with Gro plc to landscape the garden of his, Chu’s, personal house.The directors of Do plc have only recently become aware of these contracts.Required:In the context of company law, with specific regard to the authority of company secretaries, advise the directors of Do plc whether the above agreements are binding on the company. (10 marks)

后十三岁，魏与赵攻韩。《史记·孙子吴起列传》

角钢与节点板采用角焊缝连接时，肢背与肢尖内力分配系数的出处在哪里？

双频模式移动电话机应能在哪两个频段上工作，且支持这两个频段之间的自动切换（）。

A.450MHz

B.900MHz

C.1350MHz

D.1800MHz