可治肠热便血的药是（）
A.生晒参
B.生黄芪
C.太子参
D.西洋参
E.以上皆非
参考答案：D
Few people back then had cell phones,and almost no one had____to the Internet.
A．way
B．entrance
C．approach
D．access
区别野外采集的水样是硬水还是软水，可选用
A．明矾
B．活性炭
C．肥皂水
D．石灰水
