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【多选题】
关于电池的说法正确的是( )A.
锌锰电池以锌皮为负极，中央是石墨棒为正极。
B.
银锌电池的特点是质量轻、体积小。
C.
铅蓄电池中海绵状的金属铅为负极，涂有 PbO 2 的铅板为正极 .
D.
燃料电池是无污染或者低污染的能源。但由于生产的成本太高，所以研究和开发工作进展缓慢。
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皮皮学刷刷变学霸
举一反三
【单选题】According to the Heckscher-Ohlin model ________.
A.
the gainers from trade could compensate the losers and still retain gains.
B.
everyone gains from trade.
C.
the scarce factor gains from trade and the abundant factor loses.
D.
a country gains from trade if its exports have a high value added.
【单选题】According to the Heckscher-Ohlin model,
A.
the gainers from trade could compensate the losers and still retain gains.
B.
everyone gains from trade.
C.
the scarce factor gains from trade and the abundant factor loses.
D.
a country gains from trade if its exports have a high value added.
E.
only the country with the more advanced technology gains from trade.
【单选题】The Heckscher-Ohlin modelpredicts all of the following except:
A.
which country will export which product.
B.
which factor of production within each country will gain from trade.
C.
the volume of trade.
D.
that wages will tend tobecome equal in both trading countries.
E.
None of the above
【简答题】What is the Heckscher-Ohlin theorem?
【单选题】According to the Heckscher-Ohlin model
A.
only the country with the more advanced technology gains from trade.
B.
the gainers from trade could compensate the losers and still retain gains.
C.
everyone gains from trade.
D.
the scarce factor gains from trade and the abundant factor loses.
E.
a country gains from trade if its exports have a high value added.
【单选题】An implication of the Heckscher-Ohlin- theorem is that
A.
if two countries have identical tastes, then no trade will occur between them.
B.
the relative price of a country's scarce factor of production will rise when the country is opened to trade.
C.
income distribution in a country does not change when a country is opened to trade.
D.
two countries with identical tastes can still have a basis for trade if factor endowments of the countries differ and if factor intensities of the commodities differ.
【单选题】运动神经元轴突末稍释放的乙酰胆碱与受体结合后,使终板膜上的
A.
化学敏感性离子通道开放
B.
电压门控 Ca2+通道开放
C.
电压门控 Na+通道开放
D.
电压门控 K+通道开放
E.
电压门控 Na+、K+通道开放
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