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【判断题】
凯氏定氮法测定蛋白质时凯氏烧瓶中应该放无氨水。A.
正确
B.
错误
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【单选题】2007年4月14日我国成功发射第一颗( )导航卫星,正式开始独立自主建设我国第二代卫星导航系统。(题库2019)
A.
北斗一号
B.
北斗二号
C.
北斗三号
D.
北斗四号
【单选题】If a small country imposes a tariff, then
A.
the producers must suffer a loss.
B.
the consumers must suffer a loss.
C.
the government revenue must suffer a loss.
D.
the demand curve must shift to the left.
E.
the world price on that item will shift.
【单选题】If a small country imposes a tariff, then
A.
the producers must suffer a loss.
B.
the consumers must suffer a loss.
C.
the government revenue must suffer a loss.
D.
the demand curve must shift to the left.
【简答题】2007年4月14日我国成功发射第一颗( )导航卫星,正式开始独立自主建设我国第二代卫星导航系统。A. 北斗一号 B. 北斗二号 C. 北斗三号 D. 北斗四号人
【单选题】If a small country imposes a tariff on imported motorcycles:
A.
the surplus of the domestic producers of motorcycles will decline, but the surplus of the domestic consumers will increase.
B.
the surplus of both the domestic producers and consumers of motorcycles will decline.
C.
the surplus of both the domestic producers and consumers of motorcycles will increase.
D.
the surplus of the domestic producers of motorcycles will increase, but the surplus of the domestic consumers will decline.
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