按要求写句子。
用“稳稳当当”写一句话。
刚学步的小弟弟走起路来稳稳当当的。
如图中能正确模拟吸气时肺和膈肌活动情况的是( )
已知方程组3x+5y=m+25x+3y=m的解x、y互为相反数,求m的值.
— What would you like in the future?
— I want to been engineer I grow up.