——Would you like to go shopping with me?——I'd love to, _____I can't. I have a lot of homework to do.
A：or
B：but
C：so
面对不健康的文化，我们应该怎样做？
两个灯泡，其中L1标有“6V 3W”，L2没有标记，但测得它的电阻是4欧姆，把它们串联后接在某一电路时，两灯L1、L2均能正常发光，这个电路两端的电压和灯L2的电功率分别是（ ）
—When were you born?—I was born ________ April 23, 1979.
