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问题 选择题

如图为一匀强电场，某带电粒子从A点运动到B点．在这一运动过程中克服重力做的功为2.0J，电场力做的功为1.5J．则下列说法正确的是

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A．粒子在A点和B点时的动能和电势能之和相等

B．粒子在A点的电势能比在B点少1.5J

C．粒子在A点的动能比在B点少0.5J

D．粒子在A点的机械能比在B点少1.5J

答案

答案：D

问答题

Okavango (Pty) Ltd, a company which both designs and retails female clothing, needs extra finance to expand its activities. Tiro, the company auditor, negligently audits the company accounts, which show the company operating profitably, and gives an unqualified report. The accounts and report are duly published and approved. The company is actually operating at a small loss.(a) Ayanda, a shareholder in the company, invests a further P20,000·00 in the company on the strength of the company’s apparent profitability.(b) Whizz Ltd, which specialises in menswear, wishes to expand into the female clothing market. The board of Whizz Ltd considers Okavango’s accounts and auditor’s report and believes that, although there are more profitable companies than Okavango (Pty) Ltd similarly specialising in female clothing, Okavango (Pty) Ltd has potential.Whizz Ltd purchases a controlling interest in Okavango (Pty) Ltd. Later, the true financial position of the company is revealed. The effect is that credit and borrowing facilities are withdrawn, the company’s trading position deteriorates and the value of its shares falls dramatically. Within nine months the company goes into liquidation.Required:Advise Ayanda, Whizz Ltd and the liquidator whether they have a claim against Tiro, the company’s auditor. (10 marks)
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问答题 简答题

国内比赛如何分组？
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