A:255分
B:84分
C:84.5分
D:86分
① What are you doing? ____ A. No,she isn't.
② What is your mum doing? ____ B. Yes I am.
③ Can I use your pen? ____ C. I'm cleaning my room.
④ Is Sarah reading a book? ____ D. She is cooking fish.
⑤ Are yoy doing homework? ____ E. Sure.
“家”共____画,第2画是____,组词____。
“吓”共____画,第5画是____,偏旁是____。
“跟”共____画,第3画是____,偏旁是____。
“象”共____画,最后1画是____,组词____。
情境一:分别时
情境二:重逢时
因式分解:x3﹣10x2﹣24x=____.