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【多选题】
按石灰岩的结构组分,可以把石灰岩划分为三个大的结构类型,即:()、()、()。A.
颗粒—灰泥石灰岩
B.
晶粒石灰岩
C.
致密石灰岩
D.
生物格架—礁石灰岩
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举一反三
【单选题】Disabled people are more respected. Even the government no longer____the belief that disabled people are improper as teachers.
A.
contributes to
B.
subscribes to
C.
attends to
D.
objects to
【单选题】One reason we need government, even in a market economy, is that
A.
there are insufficient quantities of externalities in the absence of government.
B.
property rights become too entrenched in the absence of government.
C.
the invisible hand seldom leads to an efficient allocation of resources in any market
D.
the invisible hand, while powerful, is not perfect.
【简答题】小王要将一篇19800字的文章录入电脑，则完成录入时间t（分）与录入速度v（字／分）之间的函数关系式是_____________________.
【单选题】One reason we need government, even in a market economy, is that
A.
there is insufficient market power in the absence of government.
B.
property rights are too strong in the absence of government.
C.
the invisible hand is not perfect.
D.
Both a and b are correct.
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