肾气丸中用量最大的药物是（）
A.附子
B.桂枝
C.山萸肉
D.干地黄
E.山药
参考答案：D
He likes sleeping with the windows ______ to keep the air ______. [ ]
A. open; fresh
B. open; freshly
C. close; fresh
D. close; freshly
