practise riding a bike的中文意思

practise riding a bike的中文意思 计算(a+bi)* (a-bi) - Nick is riding a riding in a car? practise practise (a+bi)(a−bi)=? riding a+bi的虚部是b还是bi a+bi中bi指什么 riding a bike怎么读 What about riding a bike? a+bi是什么意思 计算(a-bi)^3 Riding a bike is exercise.为什么Riding不能用ride? z=a+bi 证明 |z|^2 = (a+bi)(a-bi) [追加30]z=a+bi 证明 |z|^2 = (a+bi)(a-bi)想好半天. practise a lot的意思是什么? bi-