问题
单项选择题
Which of the following is true according to the passage
A．Natural rose fragrance is 100 times more expensive to produce than artificial rose fragrance.
B．The most important ingredient in a rose fragrance is obtained from natural rose oil at a low cost.
C．A different synthetic substance can be made for 1% of the cost.
D．Natural rose oil costs the same as its fragrances.
答案
参考答案：A
解析：[分析] 是非题型。 见第一段第二句的后半部分：For example，the vital ingredient in a rose fragrance is extracted from natural rose oil at a cost of thousands of dollars a pound；an identical synthetic substance can be made for 1% of this cost．意即：玫瑰香(料)所需的成分是从天然玫瑰油中萃取的，这种萃取物一磅价值要数千美元；而人工合成的玫瑰香料价值只是天然的百分之一。因此选项A为答案。