下列杏苏散中含有的药物是（）。
A.半夏、桑叶
B.苏叶、生姜
C.茯苓、沙参
D.人参、前胡
E.麦冬、枳壳
参考答案：B
解方程：3x2=5x+2
Washington, a state in the United States, was named _______one of the greatest American presidents.
A．in memory of
B．by means of
C．instead of
D．in remembering of
