水产品原料的蛋白质易被人体消化吸收，消化率高达（）。
A.83-85%
B.85-87%
C.87-89%
D.89-91%
参考答案：C
Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of the compass first came from.
A．how
B．what
C．where
D．that
组织删减质量管理体系要求的理由可来自几方面？
