-____ on the wall?
-There are some pictures. [ ]
A. what's
B. Who's
C. What's
答案:C
He _________ the Young Pioneer in 2005.[ ]
A. took part in
B. joined
C. joined in
根据下面的应用题,写出各算式的意义.
百货商店卖出3箱保温式电饭锅,每箱6个,每个保温式电饭锅卖165元,一共可以卖多少元?
①165×6表示______.
②165×6×3表示______.
③6×3表示______.
④165×(6×3)表示______.