从北半球的春分日到夏至日,太阳直射点在地球上的运动过程是
A:赤道→南回归线
B:赤道→北回归线
C:北回归线→赤道
D:南回归线→赤道
实验室不用稀硫酸与大理石反应制取二氧化碳的原因是( )
too, is, expensive, it ( . )
____
读句子选出正确答语。
(____) 1. Where is your home? A.Sounds good!
(____) 2. How do you get to school? B.It's on First Street.
(____) 3. See you. C.Sorry.
(____) 4. Let's play outside. D.I get to school on foot..
(____) 5. Don't cross the street. E.Bye.