台湾农家一般用()来代替茶。
A.白开水
B.酒
C.较浓的汤
D.饮料
参考答案:C
用酸性氢氧燃料电池为电源进行电解的实验装置如下图所示。下列说法正确的是( )
A.燃料电池工作时,正极反应为:O2+ 2H2O + 4e- ="==" 4OH-
B.若a极是铁,b极是铜时,b极逐渐溶解,a极上有铜析出
C.若a、b极都是石墨,在相同条件下a极产生的气体与电池中消耗的H2体积相等
D.若a极是粗铜,b极是纯铜时,a极逐渐溶解,b极上有铜析出
An American call has a strike price of $60 and expires in 1.5 years. The current price of the underlying is $58.5 and the risk-free rate is 3.5%. The minimum value of this call is:()
A. $0
B. $0.53
C. $1.52