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【单选题】
The sign the underground station there is red.A.
with
B.
for
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【简答题】子宫平滑肌抑制药可()子宫平滑肌收缩,临床上主要用于()。
【简答题】书法小组的男生比民乐小组的女生少( )人。
【单选题】From an economic perspective, imposition of a per unit tax is only advantageous if:
A.
the social benefits derived from added tax revenues are sufficient to overcome the social costs at a risk-adjusted rate of return..
B.
the social benefits derived from added tax revenues are sufficient to overcome the private costs at a risk-adjusted rate of return..
C.
the benefits derived from added tax revenues are sufficient to overcome the economic costs tied to the deadweight loss in social welfare.
D.
positive tax revenues are generated.
【简答题】下列坐标图所表示的量的关系正确的是 （ ）
【简答题】下列图象能正确表示对应变化关系的是
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