A:
B:7
C:6
D:
64÷16=____4×24=____70÷35=____
下列物质的沸点按由高到低的顺序排列正确的是()①CH3(CH2)2CH3 ②CH3(CH2)3CH3 ③(CH3)3CH ④(CH3)2CHCH2CH3