如图,数轴上有A,B,C,D四个点,其中到原点距离相等的两个点是( )
A:点B与点D
B:点A与点C
C:点A与点D
D:点B与点C
对南极进行科学考察较为合适的时间是( )
连线题。
①What colour are they? ____ A. Let's wait.
②Touch this. Is it hard?____ B. No, she can't
③Look at the light. It's yellow.____ C. They are black and white.
④Can she play yo-yo? ____ D. Yes, it is.