某次双烯分析结果为
请计算双烯选择加氢的选择性?
参考答案:
(1)选择性=(9.65-9.19)/(1.36-0.27)*100%=42.2%
双烯选择加氢的选择性为42.2%
______ he like ______ in China? [ ]
A. Does, working
B. Is, working
C. Does, work
D. Is, to work
车辆在补卡操作时,车辆必须在车道中。