四逆汤和理中丸两方组成中均含有的药物是（）
A.附子
B.人参
C.桂枝
D.干姜
E.白术
参考答案：D
简述钛的性质。
It's always difficult being in a foreign country, _______ if you don't speak the language.[ ]
A. equally
B. naturally
C. basically
D. especially
