单项选择题

通过食物成分表中的数据计算出来的膳食营养素只能看成是一个什么值 A.
估计值 B.
准确值 C.
估算值 D.
较为准确的估计值

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请根据下述描述，找出名词对应的类及它们之间的继承关系，即和继承 There are two different kinds of employees in the company:Workers - Workers do not supervise anybody. They are paid a weekly salary. Managers - Managers supervise one or more employees. In addition to a weekly salary, they also get a bonus based on the number of employees they manage. Assume that one employee is supervised by at most by one manager. A manager can be supervised by another manager.

答案： Worker，Manager employee

多项选择题

国际技术贸易的“国际性”反映在()
A.当事人处于同一国家
B.当事人分处于不同国家
C.当事人属于不同国籍
D.技术跨越国境转移
E.技术在一国境内转移