《西厢记》是我国元代作家______创作的。( )
A．关汉卿 B．汤显祖C．王实甫 D．蒲松龄
参考答案：C
An investor buys 200 shares of ABC at the market price of $100 on full margin. The initial margin requirement is 40 percent and the maintenance margin requirement is 25 percent. If the shares of stock later sold for $ 200 per share, what is the rate of return on the margin transaction（）
A. 250%.
B. 100%.
C. 200%.
董仲舒认为：王字当中的三画是（）？
A、天地神
B、天地男人
C、天地人
D、天地王
