—Would you like to join us in the game? 

—_______, but I have to help my mum. [ ]

A. I will

B. I'd love to

C. I'm afraid not

硅和锗三极管的门电压不同，分别为（）伏。

A.0.2，0.5

B.0.2，0.3

C.0.5，0.2

D.0.3，0.2