A: C2H2、C2H5OH、HOCH2CH2COOH
B: C6H6、C5H10、C6H5COOH
C: HCHO、HCOOCH3、C6H12O6
D: H2、CO、CH3OH
0.87×8.907=____
0.43×7.09=____
填空
9 + ____ = 12 ____ + 5=18 4+ ____ =12
7+ ____ =15 5+ ____ =12 8+ ____ =16