炙甘草汤中用量最大的药物是（）
A.熟地黄
B.炙甘草
C.阿胶
D.山萸肉
E.生地黄
参考答案：E
She didn’t come to school this morning. She is ill.
A．May be
B．Maybe
C．May
D．Might
什么是种间竞争简述种间竞争的特点和类型。
