— __________ attend the folk concert tonight, Judy?
— I'd love to, but I'm busy preparing for the exam!
A:Why not you
B:Shall we
C:What about
D:Perhaps you shouldn't
他的发明将热能转化为机械能,解决了机器的动力问题。直到今天,人们仍以他的名字作为计算功率的一种单位。他是( )