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【单选题】
电梯发明以来的 160 多年里,除了斜坡式上下运行的自动扶梯,就是采用缆绳牵引厢体垂直运动的升降梯。德国某工程公司设计了一套叫“ Multi ”的电梯,该电梯大胆去掉了烦琐的缆绳,取而代之的是类似于磁悬浮列车和超级高铁的线性电机,其可以在摩天大楼里上下左右随意穿梭。“ Multi ”电梯的发明给我们的启示有: 1要敢于质疑和探索,善于利用客观条件 2要善于思考和创新,具有革命批判精神 3要勤于实践和创造,正确发挥主观能动性 4要勇于拼搏和超越,突破主客观因素限制 A. 12 B. 13 C. 23 D. 24A.
B.
C.
D.
D
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举一反三
【单选题】One reason that the quantity demanded of a good tends to rise as its price falls is that:
A.
the decrease in price shifts the supply curve downward.
B.
people feel a bit richer and increase their use of the good.
C.
demand has to rise to restore equilibrium after a price reduction.
D.
suppliers are willing to supply more at lower prices.
E.
the decrease in price shifts the demand curve upward.
【单选题】The average price of milk products is expected to rise considerably in the next month due to the_____costs a ssociated with dairy farming.
A.
decreased
B.
increased
C.
approach
D.
impress
【单选题】A good is called an inferior good if sales______.
A.
are unaffected by income
B.
rise as price increases
C.
decline as price increases
D.
decline as income increases
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