为预防老年人骨质疏松，膳食中应增加富含的饮食是（）
A.铁
B.钠
C.钾
D.钙
参考答案：C
在近代美学的范畴体系中，广义的美是（）；狭义的美则是指（），它与崇高、滑稽等范畴并列，它以形式上的为特征。
The story that happened 30 years ago still remains ____ in my mind as if it _____ yesterday. [ ]
A. clean; happened
B. fresh; happened
C. clear; was happened
D. clearly; happened
