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【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
题目标签:铁素体磁铁磁铁
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参考答案:
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

【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.
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

【单选题】名词翻译:磁铁

A.
calendar
B.
magnet
C.
landmark
D.
fat
相关题目:
【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
【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.
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
【单选题】名词翻译:磁铁
A.
calendar
B.
magnet
C.
landmark
D.
fat
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