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【单选题】
已知函数 ，则函数（ ）A.
是奇函数，且在 上是减函数
B.
是偶函数，且在 上是减函数
C.
是奇函数，且在 上是增函数
D.
是偶函数，且在 上是增函数
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举一反三
【单选题】Two equivalent ways to view GDP are as the:
A.
total payments made to all workers in the economy or the total profits of all firms and businesses in the economy.
B.
total expenditures on all goods produced in the economy or the total income earned from producing all services in the economy.
C.
total profits of all firms and businesses in the economy or the total consumption of goods and services by all households in the economy.
D.
total income of everyone in the economy or the total expenditure on the economy's output of goods and services.
【简答题】利用功能块完成起保持停电路的编程。(WORD文档提交,过程要详细)
【简答题】赖昂的文具盒里有一把 ____ ,专修指甲用。( P )
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