初乳最大的特点是（）
A.含乳糖高
B.含脂肪高
C.含微量元素少
D.含免疫物质多
E.易消化吸收
参考答案：D
什么是会计凭证？会计凭证有哪些作用？国库会计凭证分为哪几类？
It is _________ he is always addicted to video games _________ makes his parents worried about him.
A．/; that
B．what; that
C．that; that
D．because; that
