题目

—Where is my English dictionary, Mum? —It ______ away by your sister yesterday. A. took           B. takes            C. is taken              D. was taken 答案：D如图反映了________，其中实验室测量力的工具弹簧测力计就是根据这一原理制成的．若有一只弹簧测力计，其刻度范围是0-5N，最小分度值是0.2N，当称钩上不挂重物时，指针指在0.2N处，当称钩挂上4.8N重物时，指针指在________处；若称钩上挂一重物时，指针指在4.0N处，此时重物的实际重力是________．