除凉血止血外，又能清肝泻火的药物是（）
A.小蓟
B.地榆
C.侧柏叶
D.槐花
E.白茅根
参考答案：D
.
_____ price decline ______ farmers' income, the central government has decided to buy more crops to protect farmers.
A．Preventing; to affect
B．To prevent; affecting
C．Having prevented; affecting
D．To prevent; being affected
目前我国国产液压油的牌号一般用（）粘度表示。
A、动力
B、运动
C、相对
D、条件
