从一副无大小王的扑克牌中任取一张牌,是红心A的概率为______.
P(红心A)=152.
故本题答案为:152.
在①单质、②氧化物、③酸、④碱等四类物质中,经一步反应可以生成盐的是[ ]
A.只有①②③
B.只有②③④
C.只有①②④
D.①②③④
— ______ expensive mobile phone it is!
— Yes, but I think ______ style is quite fashionable.[ ]
A. What a; a
B. How; the
C. What an; the
D. How an; the