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【单选题】
诱导试管苗分化，培养基的调整应A.
加大生长素的浓度
B.
加大分裂素的浓度
C.
加活性炭
D.
降低盐的浓度
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举一反三
【简答题】粉体材料结拱产生的原因?
【简答题】是党和国家的生命线、人民的幸福线,也是党内政治生活正常开展的根本保证。
【单选题】Which of the following is true of a voluntary export restraint (VER)?
A.
a. A voluntary export restraint ensures that foreign exporting firms are unable to exercise monopoly power.
B.
b. A voluntary export restraint usually requires that the foreign exporting firms act like a cartel, restricting sales and raising prices.
C.
c. A voluntary export restraint generates more revenue for the government than a tariff or quota.
D.
d. Voluntary export restraints have only been used by the poor and developing nations to protect their domestic industries.
【简答题】“Voluntary”Export Quotas
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