麻黄在阳和汤中的作用是（）。
A.宣肺平喘
B.发汗解表
C.利水消肿
D.宣通阳气
E.收敛止汗
参考答案：D
Books are made _____paper and paper is made _____ wood and bamboo
A. from, from B. of, of C. of, from
The supermarket provides customers _____ plastic bags for free.
A．on
B．with
C．of
D．in
