马钱子须炮制后入药,其炮制的目的是()。
A.提高疗效
B.改变药性
C.减缓毒性
D.便于贮藏
E.便于制剂
参考答案:C
— Sam , you are late again . What’s your ______this time?
— Oh, sorry. I _______ the wrong bus this morning
A.excuse; traveled
B.method; took
C.excuse; took
D.method ; caught
简述室内浅水池的结构形式。