下载APP
【单选题】
永久磁铁中磁畴:
A.
以固定位置排列，各方向互相抵消
B.
以固定位置排列，一个方向上占有优
C.
材料呈现高矫顽力
D.
全部向一个方向排列
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Questions 57 to 61 are based on the following passage. Within fifteen years Britain and other nations should be well on with the building of huge industrial architectures for the recycling of waste. T...
A.
attempts to find efficient ways of recycling wastes
B.
efforts to protect the environment in British cities
C.
a good way to locate plants for waste recycling
D.
a cheap way to get energy from waste materials