火箭飞行的依据是（）
A．阿基米德定律
B．万有引力定律
C．能量守恒定律
D．动量守恒定律
参考答案：B
下列具有种子的植物是（ ）
A．海带
B．油松
C．肾蕨
D．满江红
If the Capital Asset Pricing Model (CAPM) applies and transactions costs are permitted, all else equal, the most likely result is that the security market line (SML) will:（）
A. plot on a flatter line.
B. plot on a steeper line.
C. no longer plot on a single line.
