100×4=____
120×4=____
With the quality-oriented education (素质教育) being carried out, teachers won't too much importance to students' grades.
定义新运算:对于任意实数a,b都有:a⊕b=a(a+b)+1,其中等式右边是通常的加法、减法及乘法运算.如:2⊕5=2×(2+5)+1=2×7+1=15,那么不等式-3⊕x<13的解集为____
-________________
-He is cleaning the room.( )
你我他都是从腹中降生,可你知道人体发育的起点是什么()