A:AB = A⋅MB⋅M
B:AB = A+MB+M
C:b2a = b+12a+1
D:1x+2 = 33x+6
探源人:读书如开窗,开窗可以清洁室内空气,读书能够净化人的灵魂。
采蜜人:读书好比饮食,有些只需浅尝,有些可以吞咽,少数则需要仔细咀嚼、慢慢品味。
在等压面示意图中,画法正确的是( )
— Who's that man in our classroom? It ________ be Mr. Brown. He is much taller.— You mean the man in white? He is an exchange student from England.