题目

投掷3次硬币，有2次正面朝上，1次反面朝上，那么投掷第4次反面朝上的可能性是（ ）。 A . 1 B . C . D . 答案：DAccording to the research, the higher the standard of living, the ___________.A．greater is the amount of goods is consumedB．greater amount of goods consumedC．amount of goods is used greaterD．greater the amount of goods consumed