杠杆原理是谁发明的?
人气:469 ℃ 时间:2020-05-19 22:22:31
解答
这个没有记载,不过最早好像是阿基米德说过的什么豪言壮语:“给我一个支点,我可以撬动地球”
推荐
猜你喜欢
- 若a的相反数等于2,|b|=3,则求a+b的值.
- 若a,b,c是三个不同的非0自然数,M=a/b/c,M至少有多少个因数?
- 求直线y=2x-1被椭圆x^2/4+y^2/9=1所截得的弦长
- He is () a () hero,we should learn from him.A.real,real B.really,really C.real,reaay D.rally,real
- Who like me,and so that he can not.(翻译中文)
- 下列成语中,其本意主要是化学变化的是() A.百炼成钢 B.积土成山
- this is a photo of ____when they were young
- ()is good for us to do morning exercises填人称代词