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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】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】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
【判断题】铁磁性、亚铁磁性及反铁磁性是强磁性。
A.
正确
B.
错误
【判断题】起重电磁铁吸吊生锈的钢材或夹层钢扳属正常作业。
A.
正确
B.
错误
【判断题】奥氏体是铁磁性的。
A.
正确
B.
错误
【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】交流电磁铁动作过于频繁，将使线圈过热烧毁的原因是( )。
A.
消耗动能过大
B.
自感电动势变化过大
C.
穿过线圈中的磁通变化太大
D.
衔铁吸合前后总磁阻相差很大
【单选题】换向阀中的电磁铁发出噪音是（）造成的。
A.
滑阀拉毛
B.
绕组绝缘不良
C.
衔铁接触不良
D.
电压太低
【单选题】纯磁铁的分子式是（）。
A.
Fe2O3
B.
FeO
C.
Fe3O4
【判断题】在直流电磁铁中，楞角气隙是工作气隙
A.
正确
B.
错误
【单选题】具有铁磁性的物质是
A.
铜
B.
硼
C.
钴
D.
镁
E.
铝
【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
【判断题】地球是一块磁铁。
A.
正确
B.
错误
【判断题】起重电磁铁吸吊生锈的钢材或夹层钢板属正常作业。
A.
正确
B.
错误