初二科学和英语
科学：当水面处于秤盘“0牛”刻度线时,测得水面离称盘底0.05米,已知秤盘的底面积为200平方厘米,秤盘受到的浮力是多少?（g=10牛/千克）
英语：句子改错
There is going to have a birthday partty next week.
Can you studying for a math test.
Can you play tennis to us on Friday.
On wednesday I have to writing a letter to my dad.