一质量为1kg的物体沿直线运动，其v-t图象如图所示，则下列说法正确的是（　　）

A．物体在4s末的速度小于在7s末的速度

B．物体在1s末的加速度小于物体在7s末的加速度

C．物体在1s末的加速度方向与物体在7s末的加速度方向是相同的

D．物体在6-8 s内受到合外力大小为0.25N

Deighton Industries has 200000 bonds outstanding. The par value of each corporate bond is $1000, and the current market price of the bonds is $965. Deighton also has 6 million common shares outstanding, with a book value of $35 per share and a market price of $28 per share. At a recent board of directors meeting, Deighton board members decided not to change the company’s capital structure in a material way for the future. To calculate the weighted average cost of Deighton’s capital, what weights should be assigned to debt and to equity Debt Equity （）①A. 56.55% 43.45% ②B. 48.85% 51.15% ③C. 53.46% 46.54%

A. ①

B. ②

C. ③