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【单选题】
( )年,北斗卫星导航系统已经形成了区域被动式定位、导航、授时能力。A.
2011
B.
2012
C.
2013
D.
2014
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【单选题】Children depend on their parents for food and _______.
A.
cloth
B.
coat
C.
dressing
D.
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【单选题】Suppose a consumer buys only food and clothing. If the quantity of food bought decreases while that of clothing remains the same, their marginal utility from food will:
A.
fall relative to the marginal utility of clothing.
B.
rise relative to the marginal utility of clothing.
C.
rise, but not as fast as their marginal utility of clothing rises.
D.
fall, but not as fast as their marginal utility of clothing falls.
【单选题】Which of the following sentence is CORRECT?
A.
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B.
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C.
I have been teaching for 25 years and I can ’ t imagine doing anything else.
D.
You ’ re telling me. I ’ ve been knowing about it for a long time.
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A.
foods; clothings
B.
food; clothing
C.
foods; clothing
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【单选题】Children depend on their parents for food and _______.
A.
cloth
B.
coat
C.
dressing
D.
clothing