下列几种电阻温度计中,哪种温度计的准确度最高()。
A、铁电阻温度计;
B、铜电阻温度计;
C、镍电阻温度计;
D、铂电阻温度计。
参考答案:D
加油站女员工坐姿错误的是()。
A、如穿员工裙装,入座前应将裙角向前收拢
B、两腿并拢,双脚同时向左或向右放
C、双腿交叉重叠,但要注意将上面的腿回收,脚尖向下
D、双手自然下垂
Brunner, the famous American psychologist, holds that learners should organize knowledge for themselves by using discovery method rather than having materials ______ by the teacher.