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【单选题】
下列哪种不属于植物性农药A.
除虫菊素
B.
烟草
C.
鱼藤酮
D.
杆菌
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【简答题】We chatted for half an hour before he finally got _____ the point: He wanted to work as a business consultant and wondered if I could pass along the names of certain potential s.
【单选题】We chatted for half an hour before he finally _______ : He wanted to work as a business consultant and wondered if I could pass along the names of certain potential clients.
A.
made his point
B.
got to the point
C.
carried his point
D.
proved his point
【单选题】We chatted for half an hour before he finally______: he wanted to work as a business consultant and wondered if i could pass along the names of certain potential clients.
A.
get to the point
B.
got to the point
C.
gets to the point
【单选题】Yesterday I came across a friend of mine on the street and we chatted for half an hour. You know, it's months _____ we met again. [ ]
A.
before
B.
since
C.
that
D.
after
【单选题】对乙烯合成低密度聚乙烯和高密度聚乙烯的聚合反应机理,描述正确的是( )。
A.
均为自由基聚合
B.
均为离子聚合
C.
前者是离子聚合，后者为自由基聚合
D.
前者是自由基聚合，后者为离子聚合
【简答题】合成高密度聚乙烯的机理是
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