一度电可以( )
A:使80W的电视机工作25h
B:使40W的日光灯工作60h
C:使100W的电烙铁工作10h
D:使1000W的碘钨灯工作5h
世界上现存最早的、标有确切日期的雕版印刷品是( )
-- You seem familiar with Mr. John.-- Of course, we_______ together for three years in the 1990s.
My mother often cooks _______ for us.