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【单选题】
Die Lehrerin hilft oft Schülern.A.
die
B.
den
C.
der
D.
dem
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【单选题】They felt ________ it was high tax and low income ________ contributed to the extreme misery of the working people at the bottom of the ladder.
A.
/；that
B.
that; which
C.
that; what
D.
/; which
【单选题】“High-income countries have a price level which is much higher than the low-income countries.” Which of the following is most likely to explain this price differential?
A.
With the development process of a nation, its productivity in making traded goods rises much faster than that in making non-traded goods.
B.
Traded goods are much more sensitive to the income levels than are non-traded goods and services.
C.
Prices of non-traded goods and services are relatively stable across high and low-income nations.
D.
Labor involved in production of non-traded goods and services in high-income nations receive lower wages than the labor producing traded goods.
【单选题】According to Lucas，richer people’s happiness .
A.
comes from their high income
B.
may not be directly related to their high income
C.
is boosted by their high income
D.
is not derived from their high income
【简答题】掷两颗均匀的骰子,它们出现的点数之和为 8 的概率为(格式x/y)
【简答题】设给定图 G (如图四所示 ) ,则图 G 的点割 集是 _______ .
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