①—You are Danny.
—Yes. I'm Danny.
②Look,I'm tall and fat. Who am I?
③Look at my eyes. My eyes are small and brown.
④My nose is big. My mouth is big,too.
____
甲乙两地相距1500千米.飞机从甲地到乙地是顺风,需2小时;从乙地返回甲地是逆风,需2.5小时,则飞机往返的平均速度是( )千米∕时.
写出下列词语的近义词。
将强—____ 疑惑—____
气馁—____ 诧异—____
奶奶做饭时,小军在旁边仔细观察,联想到许多物理现象,其中错误的是