题目: Our English teacher was standing ________ us so that she could hear us all clearly. [ ]A. away from B. far behind C. between D. among 答案: 答案:D
题型:填空题 保险丝的作用是:当电路的电流过大时,能迅速的______电路,从而保护电路;所以保险丝选取电阻______、熔点______的铅锑合金材料.现在新建的楼房都用______代替保险丝了. 查看答案