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【单选题】
B1 细胞接受碳水化合物刺激后 , 产生的抗体主要是A.
高亲和力 IgG 类抗体
B.
高亲和力 IgM 类抗体
C.
低亲和力 IgG 类抗体
D.
低亲和力 IgM 类抗体
E.
低亲和力 IgA 类抗体
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举一反三
【单选题】Most scientists in the world today firmly believe the effective means to stop global warming is to reduce emissions of air _____.
A.
pollutes
B.
polluting
C.
pollutants
D.
pollution
【单选题】Such a move would slash dependence on oil, create thousands of jobs, and reduce emissions that contribute to global warming.
A.
delete
B.
reduce
C.
demolish
D.
slaughter
【简答题】The Kyoto Protocol set out specific commitments by individual developed countries to reduce emissions by _____ by the period 2008-2012.
【简答题】reduce emissions _____ an everage of 5.2%
【简答题】Maive Rute suggests feeding animals a ______ designed to reduce emissions.
【单选题】With use of _____ to reduce emissions, the marginal benefit of an additional unit of pollution is the same for all polluters.
A.
an environmental standard
B.
an emissions tax
C.
a tradable emissions permit
D.
an emissions tax or a tradable emissions permit
【单选题】Why did Xiaoli run away?
A.
Because she thought Dalong wanted her life.
B.
Because she thought Dalong wanted her knife.
C.
Because she thought Dalong wanted her book.
D.
Because she thought Dalong wanted her bag.
【单选题】Why did Xiaoli run away?
A.
Because she thought Dalong wanted her life.
B.
Because she thought Dalong wanted her knife.
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