My mom lets me _______ at six in the morning and ______ at nine at night.
A:get up; go to bed
B:eat dinner; eat breakfast
C: go home; go to school
D:take a shower; eat lunch
西方学者李普曼在其《道德序论》中指出:“在近代,人们已发明了作出发明的方法,人们已发现了作出发现的方法。机械的进步不再是碰巧的、偶然的,而成为有系统的、渐增的过程。”这说明( )
“欲穷千里目”为什么要“更上一层楼”( )