我国的安全电压等级是（）。 A．12V B．24V C．36V D．48V

下列各句中加点的熟语使用恰当的一项是                  （     ）

A．阿Q虽然似乎懂得，但总觉得站不住，情不自禁的蹲了下去。

B．作为邀请外国俱乐部来访比赛的始作俑者，该公司担心客队不能尽遣主力上阵。

C．北京时间1月17日上午，第62届金球奖颁奖典礼在美国洛杉矶的希尔顿酒店隆重举行。在最佳外语片的角逐中，靠人气和票房成为大热门的由中国著名导演张艺谋拍摄的电影《十面埋伏》在评选中铩羽而归。

D．去年，在中央召开的征求关于修改宪法部分内容的建议的座谈会上，有的专家硬是鸡蛋里面挑骨头，指出了现存宪法中的许多不足和漏洞。

Sid is a director of two listed public companies in which he has substantial shareholdings: Trend Co and Umber Co.The annual reports of both Trend Co and Umber Co have just been drawn up although not yet disclosed. They show that, Trend Co has made a surprisingly big loss and that Umber Co has made an equally surprising big profit. On the basis of this information Sid sold his shares in Trend Co and bought shares in Umber Co. He also advised his brother to buy shares in Umber Co.Vic who is also a shareholder in both companies sold a significant number of shares in Umber Co only the day before its annual report was published.Required:

(a) Analyse the above scenario from the perspective of the law relating to insider dealing; (8 marks)

在拆动二次线时，应采取哪些措施？

吗啡禁用于

A．慢性消耗性腹泻

B．脑肿瘤引起的头痛

C．烧伤疼痛

D．骨折引起的头痛

E．心源性哮喘

筏形基础的混凝土浇筑完毕后，表面应覆盖和洒水养护不少于( )d。

A．7

B．5

C．4

D．6