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【单选题】
在下列SQL语句中,修改表结构的语句是A.
ALTER
B.
CREATE
C.
UPDATE
D.
INSERT
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举一反三
【单选题】When people specialize in the activity in which they have a comparative advantage,
A.
there cannot be a division of labor, though production will increase.
B.
there will likely be a division of labor as well as an increase in output.
C.
there will be a gain from trade, but production will not be increased.
D.
there will likely be a division of labor, and output will stay the same.
【判断题】A comparative advantage exists when a country can produce something more cheaply and/or of higher quality than any other country.
A.
正确
B.
错误
【单选题】When a country has a comparative advantage in producing a certain good,
A.
the country should import that good.
B.
the country should produce just enough of that good for its own consumption.
C.
the country’s opportunity cost of that good is high relative to other countries’ opportunity costs of that same good.
D.
None of the above is correct.
【单选题】患者，女，25岁。1型糖尿病，病程3余年，使用胰岛素治疗。近两日出现恶心、呕吐，不能正常进食，突然发生昏迷，测血糖3.3mmol/L。考虑为
A.
低血糖昏迷
B.
糖尿病酮症酸中毒
C.
糖尿病肾病尿毒症昏迷
D.
高渗非酮症糖尿病昏迷
E.
乳酸性酸中毒
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