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【单选题】
有机卤素药物中的卤原子为芳香环的取代基时，为使其转变为无机卤素离子，应该采用的方法是(    )
A.
将药物溶于溶剂，加碱后，回流，使其溶解
B.
将药物溶于碱溶液，加强还原剂，加热回流，使其裂解
C.
将药物溶于碱溶液，加强氧化剂，加热回流，使其裂解
D.
氧瓶燃烧法
E.
凯氏定氮法
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举一反三
【单选题】The bowed shape of the production possibilities frontier can be explained by the fact that
A.
all resources   are scarce.
B.
economic growth   is always occurring.
C.
the opportunity   cost of one good in terms of the other depends on how much of each good the   economy is producing.
D.
the only way to   get more of one good is to get less of the other.
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【单选题】The difference between production possibilities frontiers that are bowed out and those that are linear is that
A.
bowed out production possibilities frontiers illustrate tradeoffs where linear production possibilities frontiers do not.
B.
bowed out production possibilities frontiers show increasing opportunity cost where linear ones show constant opportunity cost.
C.
bowed out production possibilities frontiers are the result of perfectly shiftable resources where linear production possibilities frontiers are not.
D.
linear production possibilities frontiers illustrate real world conditions more than bowed out production possibilities frontiers.
查看完整题目与答案
【判断题】The production possibilities frontier is bowed outward because the trade-offs between the production of any two goods are constant.
A.
正确
B.
错误
查看完整题目与答案
【单选题】地面的地形和大的建筑物会:
A.
汇聚风的流向
B.
产生会快速改变方向和速度的阵风
C.
产生稳定方向和速度的阵风
D.
/
查看完整题目与答案
【单选题】The concavity (bowed-out shape) of the production possibilities curve is the result of:
A.
the law of demand.
B.
the law of supply.
C.
the law of increasing opportunity cost.
D.
complementarily in consumption.
查看完整题目与答案
【单选题】The bowed production possibilities curve represents:
A.
constant opportunity costs.
B.
decreasing opportunity costs.
C.
increasing opportunity costs.
D.
none of the above
查看完整题目与答案
【单选题】来文与复文可为一件,这是一种比较特殊的一种规定。“来文与复文”,是对联系密切的来往性质的文件材料的概括性表达,也包括“去文与复文”,从文种上看包括
A.
请示与复函
B.
请示与报告
C.
函与批复
D.
通知与报告
查看完整题目与答案
【单选题】The bowed shape of the per-worker production function is caused by
A.
wealth effects that reduce labor supply.
B.
diminishing marginal productivity of capital.
C.
increasing marginal productivity of labor.
D.
increasing marginal productivity of capital.
查看完整题目与答案
【单选题】地面的地形和大的建筑物会( )
A.
汇聚风的流向
B.
产生稳定方向和速度的阵风
C.
产生会快速改变方向和速度的阵风
查看完整题目与答案
【单选题】地面的地形和大的建筑物会:
A.
汇聚风的流向,
B.
产生会快速改变方向和速度的阵风
C.
产生稳定方向和速度的阵风
查看完整题目与答案
相关题目：
【单选题】The bowed shape of the production possibilities frontier can be explained by the fact that
A.
all resources   are scarce.
B.
economic growth   is always occurring.
C.
the opportunity   cost of one good in terms of the other depends on how much of each good the   economy is producing.
D.
the only way to   get more of one good is to get less of the other.
查看完整题目与答案
【单选题】The difference between production possibilities frontiers that are bowed out and those that are linear is that
A.
bowed out production possibilities frontiers illustrate tradeoffs where linear production possibilities frontiers do not.
B.
bowed out production possibilities frontiers show increasing opportunity cost where linear ones show constant opportunity cost.
C.
bowed out production possibilities frontiers are the result of perfectly shiftable resources where linear production possibilities frontiers are not.
D.
linear production possibilities frontiers illustrate real world conditions more than bowed out production possibilities frontiers.
查看完整题目与答案
【判断题】The production possibilities frontier is bowed outward because the trade-offs between the production of any two goods are constant.
A.
正确
B.
错误
查看完整题目与答案
【单选题】地面的地形和大的建筑物会:
A.
汇聚风的流向
B.
产生会快速改变方向和速度的阵风
C.
产生稳定方向和速度的阵风
D.
/
查看完整题目与答案
【单选题】The concavity (bowed-out shape) of the production possibilities curve is the result of:
A.
the law of demand.
B.
the law of supply.
C.
the law of increasing opportunity cost.
D.
complementarily in consumption.
查看完整题目与答案
【单选题】The bowed production possibilities curve represents:
A.
constant opportunity costs.
B.
decreasing opportunity costs.
C.
increasing opportunity costs.
D.
none of the above
查看完整题目与答案
【单选题】来文与复文可为一件,这是一种比较特殊的一种规定。“来文与复文”,是对联系密切的来往性质的文件材料的概括性表达,也包括“去文与复文”,从文种上看包括
A.
请示与复函
B.
请示与报告
C.
函与批复
D.
通知与报告
查看完整题目与答案
【单选题】The bowed shape of the per-worker production function is caused by
A.
wealth effects that reduce labor supply.
B.
diminishing marginal productivity of capital.
C.
increasing marginal productivity of labor.
D.
increasing marginal productivity of capital.
查看完整题目与答案
【单选题】地面的地形和大的建筑物会( )
A.
汇聚风的流向
B.
产生稳定方向和速度的阵风
C.
产生会快速改变方向和速度的阵风
查看完整题目与答案
【单选题】地面的地形和大的建筑物会:
A.
汇聚风的流向,
B.
产生会快速改变方向和速度的阵风
C.
产生稳定方向和速度的阵风
查看完整题目与答案