假设太阳系中天体的密度不变,天体直径和天体之间距离都缩小到原来的一半,地球绕太阳公转近似为匀速圆周运动,则下列物理量变化正确的是()
is there _________ bank near here?Yes,there is.( )
A.aB.anC.the
Excuse me.Is there a bus to the Olympic Center?
.You can take the No.111bus.( )
A.Yes,it isB.Yes,there is
C.I'm not sureD.Sorry,I have no idea
There will be more and more robots going into people's homes.
.We might be able to leave all the chores to them.( )
A.Not reallyB.No way
C.You're kiddingD.I hope so
The firemen did all their best to put out the fire.
excellent firemen!( )
A.WhatB.What anC.How anD.How
Learning to love is like learning to walk.
Yes, we step out bravely,we'll find it's not so difficult.( )
A.as ifB.even though
C.as long asD.as far as