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【单选题】
学校和家长不应该只关注考试的结果。A.
Schools and parents should be focused only on exam results.
B.
Schools and parents should not focus only on exam results.
C.
Schools and parents would not focus at exam.
D.
Schools and parents would not focus in exam.
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【单选题】只有当所有的检验数λij ( )时,该土方调配方案方为最优方案
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A.
imports 150 calculators
B.
imports 250 calculators
C.
exports 100 calculators
D.
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【单选题】Refer to Figure 2-6. What is the opportunity cost to society of the movement from point A to point C?
A.
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B.
100 baseballs
C.
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D.
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【单选题】【图片】Refer to Figure 4-2. At a price of $12, there is a
A.
surplus of 1 unit.
B.
surplus of 2 units.
C.
shortage of 1 unit.
D.
shortage of 2 units.
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【单选题】只有当所有的检验数λij ( )时,该土方调配方案方为最优方案