单项选择题

人体动作表现金字塔每一层矩形的体积都代表这一层级所涵盖的动作功能功能要素，层级与层级直接的要素是在内在衔接并逐层（）的。

A．增加
B．递减
C．相同
D．稳定

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单项选择题

What is the feasible solution to Michael's financial problem?A.to borrow money from his parentsB.to borrow money from his classmatesC.to borrow money from the Welfare OfficeD.to sell his car and pay off the debt

A.to
B.to
C.to
D.to

判断题

若函数在点处存在函数值，则函数在该点处连续。

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