"春夏养阳，秋冬养阴"是属于哪一种养生原则（）
A.顺应自然
B.养性调神
C.护肾保精
D.调摄饮食
E.体魄锻炼
参考答案：A
On careful examination of your samples, we found that the cotton piece goods are well （） standard in quality.
A. until
B. up to
C. in
D. into
刃倾角是前刀面与基面之间的夹角。
