饮料中脂肪的测定原理是：样品经酸水解后用乙醚提取，除去溶剂即得游离及结合脂肪总量。
参考答案：对
Speaking of all the songs he has written, I think this is probably his____one.
better-known B. well-known C. best-known D. most-known
不属于图书馆效益的特点的是（）。
A.利润性
B.外向性
C.模糊性
D.潜在性
