患者,男,59岁。久咳不止,咳声低微,少气乏力,痰少而干,痰中有血丝。用药宜首选( )
A.黄芪B.人参C.山药D.西洋参E.甘草
参考答案:D
—What's your favorite drink?
—__________.
[ ]
A. Meat
B. Milk
C. Pear
D. Sugar
环境由什么组成?