【单选题】红绿双色试验中绿清晰.红模糊,说明试验性近附加( ),被检者仍表现( ),应递增+0.25D的正球镜。
【判断题】非离子表面活性剂6501对应的中文全称是椰子油单乙醇酰胺。
【单选题】Which of the following is TRUE according to the passage?
A.
One is considered to have reached adulthood when he has a driver's license.
B.
One is not free from the restrictions of child labor laws until he can join the army.
C.
No one can marry without the permission of his parents until the age of twenty-one.
D.
In the late 19th century in the United States the dividing line between adolescence and adulthood no longer existed.
【多选题】关于表面活性剂6501和CMEA,下列说法正确的有( )。
【单选题】红绿双色试验中红清晰.绿模糊,说明试验性近附加( ),被检者表现( ),应递减+0.25D的正球镜。
【多选题】关于表面活性剂 6501 和 CMEA,下列说法正确的有( )。
【单选题】_____ number of mobile phone users in China is _________ reache 500,000 by 2012.
【简答题】表面活性剂6501的化学名称是:()。它属于()型的表面活性剂。