动力参数一般指机械系统的动力源参数,如电动机、液压马达、内燃机的功率及其机械特性。
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Sam is going to stay with his family during Christmas.
A. 对
B. 错
Sam received many handwritten cards from his friends all over the world.
A. 对
B. 错
Sam will give Flora Katy’s number.
A. 对
B. 错
会计科目是对（ ）的具体内容进行分类核算的项目。
A. 会计对象
B. 资金运动
C. 会计要素
D. 资产
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