—Would you like to go to the cinema with me tonight? 　

—I'd love to, ______ I'm sorry I can't. I have to stay at home. 　[ ]

A. or 　　　

B. and　　　

C. so 　　　

D. but

在调节静止的情况下，平行光线入眼后（）称为散光。

A、不能形成焦点

B、焦点在视网膜前

C、焦点在视网膜后

D、焦点在视网膜上