Water is (41) important of all the things we (42) and drink. Not many people understand this, (43) it’s quite true. The human body (人体) can go (44) food for a long time, but two (45) three days without water can usually (46) people die.
Many people don’ t understand how much water the human body needs to work well and many people do not drink (47) , even (48) hot weather.
Our body is (49) water, about 65% to 75%, ff we do not have enough water, we’ll (50) tired and many will get ill. So you see, how important water is to us all.

[A] eat [B] have [C] like

如果无风险收益率为9%，市场平均风险股票收益率为13%，那么公司股票β系数为1.5时，其普通股资金成本率为（）。

A.10%

B.14%

C.15%

D.16%