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【单选题】Questions 57 to 61 are based on the following passage. Within fif 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
【单选题】电磁铁的铁芯（ ）
A.
采用钢棒，因为钢棒比铁棒硬
B.
采用铁棒，因为铁棒的磁性不能保留下来
C.
采用铁棒，因为铁棒价格较低
D.
采用钢棒，因为钢棒的磁性能够保留下来
【单选题】Questions 57 to 61 are based on the following passage. Within fif years Britain and other nations should be well on with the building of huge industrial architectures for the recycling of waste. T...
A.
The issue of rubbish-dealing can not be completely solved.
B.
Recycling plants will be in great need in rural areas.
C.
The plants can process a wide variety of materials.
D.
Effective ways of sorting out rubbish have long been in existence.
【单选题】“铁素体磁铁”指的是（）。
A.
一种用类似于陶瓷的磁性材料铁素体制造成的磁铁
B.
一种在不同区域具有不同的磁场强度和极性的磁铁
C.
用简单地将金属粉末混合物点燃的方法制造的磁铁
D.
用金属铁和金属氧化物的混合物直接制造出的磁铁
【单选题】Within fif years Britain and other nations should be well on with the building of huge industrial architectures for the recycling of waste. The word rubbish could lose its meaning because everythi...
A.
to get prepared to do
B.
to get along well with
C.
to try to complete
D.
to be very good at
相关题目：
【单选题】磁铁的磁极具有（）
A.
可分开
B.
不可分开
C.
以上都不是
【单选题】磁铁不仅可以吸铁,还可以吸?
A.
木头
B.
纸张
C.
镍
【单选题】Questions 57 to 61 are based on the following passage. Within fif 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
【单选题】下列物体中磁铁不吸引的是（）
A.
一角硬币
B.
一元硬币
C.
铁钉
【单选题】电磁铁的铁芯（ ）
A.
采用钢棒，因为钢棒比铁棒硬
B.
采用铁棒，因为铁棒的磁性不能保留下来
C.
采用铁棒，因为铁棒价格较低
D.
采用钢棒，因为钢棒的磁性能够保留下来
【单选题】Questions 57 to 61 are based on the following passage. Within fif years Britain and other nations should be well on with the building of huge industrial architectures for the recycling of waste. T...
A.
The issue of rubbish-dealing can not be completely solved.
B.
Recycling plants will be in great need in rural areas.
C.
The plants can process a wide variety of materials.
D.
Effective ways of sorting out rubbish have long been in existence.
【单选题】永久磁铁的磁通是（）。
A.
随时间变化的
B.
不随时间变化的
C.
随温度变化的
D.
随环境变化
【判断题】通用设备常用低压控制电器有接触器、继电器、主令电器、控制器和电磁铁等。
A.
正确
B.
错误
【多选题】磁铁的性质具有（）性质。
A.
磁铁会吸引铁等金属
B.
磁铁有两个磁极
C.
磁铁能指示南北方向
D.
磁铁同极相互排斥
E.
磁铁异极相互吸引
【单选题】纯磁铁的分子式是（）。
A.
Fe2O3
B.
FeO
C.
Fe3O4
【单选题】磁铁（）的乘积为磁矩。
A.
磁量与两端间的距离
B.
磁量与两极间的距离
C.
磁场强度与两端间的距离
D.
磁力与两极间的距离
【单选题】“铁素体磁铁”指的是（）。
A.
一种用类似于陶瓷的磁性材料铁素体制造成的磁铁
B.
一种在不同区域具有不同的磁场强度和极性的磁铁
C.
用简单地将金属粉末混合物点燃的方法制造的磁铁
D.
用金属铁和金属氧化物的混合物直接制造出的磁铁
【单选题】名词翻译:磁铁
A.
calendar
B.
magnet
C.
landmark
D.
fat
【单选题】Within fif years Britain and other nations should be well on with the building of huge industrial architectures for the recycling of waste. The word rubbish could lose its meaning because everythi...
A.
to get prepared to do
B.
to get along well with
C.
to try to complete
D.
to be very good at
【单选题】电磁铁属于（）。
A.
控制电器
B.
主令电器
C.
保护电器
D.
执行电器
【判断题】地球是一块磁铁。
A.
正确
B.
错误
【单选题】水久磁铁中磁畴:
A.
以固定位置排列，各方向互相抵消
B.
以固定位置排列，在一个方向占有优势
C.
材料呈现高矫顽力
D.
全部向一个方向排列