学校十月份用水100吨,比九月份节约了25吨.十月份比九月份节约了百分之几?
25÷(100+25),
=25÷125,
=15,
=20%.
答:十月份比九月份节约了20%.
30.One of the greatest of unhappiness,in my experience,is the difficulty we have in
accepting things as they are.
A.reasons
B.styles
C.supplies
D.Sources
Trendelenburg试验是用来测试()
A.腰部有无侧凸畸形
B.两下肢有无长短不均
C.髋关节的臀中肌、臀小肌的功能及股骨头与髋臼的关系是否正常
D.臀大肌是否瘫痪
E.髋关节是否强直