CPI值
参考答案：
称碳优势指数，是指原油或烃源岩可溶有机质中奇数碳正构烷烃和偶数碳正构烷烃的比值。
I'll look into the matter as soon as possible.Just have a little________.[ ]
A. wait
B. time
C. patience
D. rest
选择（）空间能表现出一种深远。
