选出与题干中加线词含义相同的一项()
如履平地___________
A:削足适履
B:西装革履
C:履险如夷
D:履行义务
如图是关节的结构模式图:
如图,自行车的链条每节长为2.5cm,每两节链条相连接部分重叠的圆的直径为0.8cm,如果某种型号的自行车链条共有60节,则这根链条没有安装时的总长度为( )
Paula
Monday
Tuesday
Wednesday
Thursday
Friday
gets up
7:10 a.m.
morning
school
lunch
pizza
bread&egg
bread
noodles
afternoon
Yo-yo
table tennis
soccer
evening
homework
TV
clothes
goes to sleep
10:15 p.m.
No one was allowed to leave the lab without the professor's p____.