当外界环境中气温高于皮肤温度时人体散热主要靠
A.蒸发
B.对流
C.传导
D.辐射
E.降低产热
参考答案:A
It was because of her _____ to children that she gave up a promising career in law to become
a teacher. [ ]
A. devotion
B. concern
C. responsibility
D. mercy
假定投资者6月份有300万资金,拟买入A、B、C三种股票,每种股票投资100万,如果6月份相应的期货指数为 1 500点,每点100元,三种股票的 β系数分别为3、2.6、 1.6,为规避股票价格上涨的风险,该投资者应买进指数期货合约( )份。
A.192
B.96
C.48
D.24