已知工件的大端厚度为40mm，小端厚度为20mm，长度为800mm，求其斜度为多少？
参考答案：
答：斜度为1：40。
In the USA, the students who study business is more than _______ those who study agriculture.
A．as many as ten times
B．as ten times than
C．ten times as many as
D．than ten times
癃闭是以哪些症状为主症的病证（）
A.小便量少
B.排尿困难
C.小便涩痛
D.甚则小便闭塞不通
E.全身浮肿
