人初乳含（）
A.糖类最高
B.蛋白质、糖类及脂肪均最低
C.脂肪量最高
D.脂肪量最少而蛋白质量最多
E.蛋白质量较低
参考答案：D
Peter was so excited he received an invitation from his friend to visit Chongqing. [ ]
A. where
B. that
C. when
D. why
天然硫酸钡(重晶石)
