CHCH+2H2催化剂加压=CH3-CH3 CH3-CH3+CL2光照=CH3CH2CL+HCLCHCH+H2催化剂加压=CH2=CH2CH2=CH2+HCL加成·催化剂=CH3CH2CLCHCH+BR2加成=CHBR=CHBRCHBR=CHBR+BR2加成=CHBR2-CHBR2CHCH+HCL加成=CH2=CHCLNC...横着看对吧对·是这样的