Let's go and help ______________. [ ]
A. she
B. she's
C. her
D. her's
答案:C
酯值是挥发油中的
A.酸值加皂化值B.皂化值减酸值C.酸值减皂化值D.羧酸和酚类成分总和E.酸值与酯值之和