高中以（）为主，并提倡课内与课外、教育与指导、咨询与服务的紧密配合。
A.活动和体验
B.体验和调适
C.游戏和活动
D.活动和调适
参考答案：B
若a＞b，则下列关系一定成立的是
A．ac＞bc；
B．ac＜bc
C．a－c＞b －c
D．ac>bc
An investor buys one share of stock for $100. At the end of year one she buys three more shares at $ 89 per share. At the end of year two she sells all four shares for $ 98 each. The stock paid a dividend of $1.00 per share at the end of year one and year two. What is the investor’s time-weighted rate of return（）
A. 6.35%.
B. -2.0%.
C. 0.06%.
