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【简答题】
将以下内容翻译成中文: Time Horizon. Goods tend to have more elastic demand over longer time horizons. When the price of gasoline rises, the quantity of gasoline demanded falls only slightly in the first few months. Over time, however, people buy more feul-efficient cars, switch to public transportation, and move closer to where they work. Within several years, the quantity of gasoline demanded falls more substantially.
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【单选题】Mary is always ready to do some __ work at the local geracomium（敬老院）in her spare time.
A.
responsible
B.
exhausting
C.
voluntary
D.
professional
【单选题】Mary is always ready to help others when they are in trouble and she never__________ their requests.
A.
turns up
B.
turns over
C.
turns in
D.
turns down
【单选题】依照《民法通则》规定，对于“依照法律规定或者按照双方当事人约定，应当由本人实施的民事法律行为”的代理选择的规定是( )
A.
不得选择代理
B.
可以选择委托代理
C.
可以选择法定代理
D.
可以选择指定代理
【简答题】Mary is always ready to help others when they are in trouble and she never __ their requests. A) turns up B) turns over C) turns in D) turns down
【单选题】素混凝土构件的实际抗扭承载力( )
A.
等于按弹性分析方法确定的
B.
等于按塑性分析方法确定的
C.
大于按塑性分析方法确定的，小于按弹性分析方法确定的
D.
大于按弹性分析方法确定的，小于按塑性分析方法确定的
【单选题】素混凝土构件的实际抗扭承载力( )
A.
按弹性分析方法确定
B.
按塑性分析方法确定
C.
大于按塑性分析方法确定的而小于按弹性分析方法确定的
D.
大于按弹性分析方法确定的而小于按塑性分析方法确定的
【单选题】Mary is always ready to do some __________ work at the local geracomium（~t~]~） in her spare time.
A.
responsible
B.
exhausting
C.
voluntary
D.
professional
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