党参米炒的炮制目的是()
A.增强健脾止泻作用
B.降低药物毒性
C.矫正不良气味
D.增强补中益气功效
E.缓和药性
参考答案:A
如图所示为某一质点运动的位移(x)一时间(t)图象,图线为一段半圆弧,则下列说法正确的是( )
A.质点做圆周运动
B.t0时刻质点离开出发点最远
C.质点运动的速度先增大后减小
D.质点一定做直线运动
"Life is like walking in the snow", Granny used to say, "because every step "[ ]
A. has shown
B. is showing
C. shows
D. showed