应用植酸酶可以提高植物性饲料中()的可利用性,并降低或消除植酸对钙、锌等元素利用率的不良影响。
A.植酸钙
B.植酸锌
C.植酸磷
D.植酸钠
参考答案:C
After ________ careful consideration, they finally decided that each child will be offered ________ university education.
A.the; a
B.不填;an
C.a; an
D.不填;a
现代文献信息的特征有哪些?