皮皮学，免费搜题
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【单选题】
芸香碱对下列哪项作用最明显A.
眼和腺体
B.
胃肠道平滑肌
C.
膀胱平滑肌
D.
支气管平滑肌
E.
骨骼肌
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Scarcity exists for those with
A.
lower incomes.
B.
average incomes.
C.
higher incomes.
D.
all of the above.
【简答题】(拉压) 根据强度条件σ≤[σ]可以进行( )、( )、( )三方面的强度计算。
【单选题】Scarcity is
A.
our inability to satisfy all our wants.
B.
a situation that exists during economic recessions but not during economic booms.
C.
eliminated by choices.
D.
an economic problem only for poor people.
【单选题】Scarcity:
A.
occurs only in centrally planned economies.
B.
will likely be eliminated by technological progress.
C.
exists only in poor nations.
D.
occurs if there are insufficient resources to provide for human wants.
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