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【单选题】
低压工频交流电器不要考虑以下哪种损耗。
A.
电阻损耗
B.
铁磁损耗
C.
介质损耗
D.
以上都要考虑
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参考答案:
举一反三
【单选题】Topic sentence________________________________. One very real problem is that of traffic signs and signals. Those that are red green colour blind have trouble seeing stop signs found on shady streets ...
A.
Colour-blind people do not have so many problems as we expect.
B.
Colour-blind people have problems that we do not understand at all.
C.
Colour-blind people have problems that people who perceive colour never think about.
D.
Colour-blind people have problems that will be solved in the near future.
【判断题】食物的相生相克是指食物之间(包括各种营养素、非营养素)相互影响、相互制约的关系。()
A.
正确
B.
错误
【简答题】Passage 5 When I asked my daughter which item she would keep: the phone, the car, the cooker, the computer, the TV, or her boyfriend, she said “the phone”. Personally, I could do without the phone ent...
【单选题】Because of the ______ noise of traffic I couldn’t get to sleep last night.
A.
progressive
B.
provocative
C.
perpetual
D.
prevalent
【判断题】每日推荐摄入量(recommended dietary allowance,RDA)是指营养素缺乏发生率较低的营养素摄入量。()
A.
正确
B.
错误
【判断题】营养素中的糖就是指淀粉。()
A.
正确
B.
错误
【简答题】人体必需的“第七类营养素”是指____________。
【单选题】营养素是指( )
A.
富含蛋白质,脂肪等化合物的食物都可以称为营养素
B.
人类为生存,健康而从外界摄取的所有食物中能提供热能的物质
C.
人类从食物中所能获得的无机盐,维生素等宏量和微量元素物质的总称
D.
机体为维持健康,保证生长发育和体力劳动必须从外界摄取的营养物质
E.
凡是能够增加人体能量的物质都可以称为营养素
【简答题】P assage Three After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: the damage and death toll could have been much worse. More than 60 people die...
【单选题】营养素需要量是指维持正常生理功能所需要的( )
A.
营养素的数量
B.
营养素的多少
C.
营养素的摄取量
D.
营养素的含量
E.
营养素的均值
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