9+____=____
3+____=____
____
①7560﹣900÷15×35
②(785﹣545)÷(32+28)
③(148﹣2988÷36)×17
④3650÷(58﹣33)×2.
We are too tired. Please stop __________ a rest.
正确地认识和评价自己,是一个人生理成熟的标志之一。( )