Standard answer

Standard answer

所有跟贴·加跟贴·新语丝读书论坛

送交者: year2226 于 2010-03-11, 17:21:48:

回答: 改成过河的题大家试试看？(有答案没过程) 由 year2226 于 2010-03-11, 13:48:08:

r=\frac{w}{\cos\theta}(\frac{1-\sin\theta}{1+\sin\theta})^{\frac{v/(2u)}}

{\frac{v/(2u)}}->{\frac{v}{2u}} (无内容) - year2226 (0 bytes) 2010-03-11, 17:24:26 (421136)