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阅读文章,回答题: Chengdu has dozens of new millionaires, Asia’s biggest building, and fancy new hotels. But for tourists like me, pandas are its top____61__________(attract). So it was a great honour to be invited backstage at the not-for-profit Panda Base, where ticket money helps pay for research, I_____62__________(arrow)to get up close to these cute animals at the 600-acre centre. From tomorrow, I will be their UK ambassador. The title will be __63__________(official) given to me at a ceremony in London.But my connection with pandas goes back ____64__________ my days on a TV show in the mid-1980s, ____65__________I was the first Western TV reporter__66__________ (permit) to film a special unit caring for pandas rescued from starvation in the wild. My ambassadorial duties will include ____67__________(introduce) British visitors to the 120-plus pandas at Chengdu and others at a research in the misty mountains of Bifengxia. On mu recent visit, I help a lively three-month-old twin that had been rejected by _____68__________ (it) mother. The nursery team switches him every few __69__________( day) with his sister so that while one is being bottle-fed, __70__________ other is with mum-she never suspects. 请回答61题__________ 查看材料
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【判断题】电焊钳的作用仅仅是夹持焊条。( )
A.
正确
B.
错误
【单选题】高频通讯控制板上功率区显示选择的输出功率级:
A.
一条为低功率,两条为全功率
B.
一条为全功率,两条为低功率
C.
一条为低功率,两条为中功率,三条为全功率
D.
一条为全功率,两条为中功率,三条为低功率
【简答题】求图中各支路电流,并计算电压源和电流源的功率,确定是吸收还是发出功率。
【单选题】叠加原理只能计算线性电路中的()。
A.
电压和电流
B.
电压、电流和功率
C.
功率
D.
电压和功率
【单选题】电能的质量指标是( )。
A.
电压、电流、功率
B.
频率、电流、功率
C.
电流、功率、波形
D.
电压、频率、波形
【判断题】群官圆署制现今已经被废除。
A.
正确
B.
错误
【判断题】电焊钳的作用仅仅是夹持焊条
A.
正确
B.
错误
【简答题】Fluid Statics 的中文名称是 ;Fluid Kinematics 的中文名称是 ;Fluid Dynamics 的中文名称是 ;Fluid Mechanics 的中文名称是 。
【判断题】电焊钳的作用仅仅是夹持焊条。( )
A.
正确
B.
错误
【单选题】()是功率半导体器件的特点。
A.
大电流
B.
小电流
C.
大功率
D.
小功率
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