Py波函数角度分布的形状是( )。
A．橄榄形 B．双球形C．球形 D．四瓣梅花形
参考答案：A
---- Have you ________ Tim to go with us'?
---- No. He wants to but he ________ care for his sister because his parents are busy.
A．regretted; should
B．persuaded; has to
C．contacted, likes to
D．introduced; needs to
简述如何确定专利侵权的赔偿数额。
