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【简答题】
如图所示,电解槽 A 和电炉 B 并联后接到电源上,电源内阻 r = 1 Ω ,电炉电阻 R = 19 Ω ,电解槽电阻 r ′ = 0.5 Ω ,当 S 1 闭合、 S 2 断开时,电炉消耗功率为 684 W , S 1 、 S 2 都闭合时,电炉消耗功率为 475 W( 电炉电阻可看作不变 ) ,试求: (1) 电源的电动势; (2)S 1 、 S 2 闭合时,流过电解槽的电流大小; (3)S 1 、 S 2 闭合时,电解槽中电能转化成化学能的功率。
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【简答题】A. Rewrite the following sentences after the models, using the structure “there is (no) room for...”. Model 1: There is not enough space for a drive-thru window, or for seating inside. →There is no ro...
【简答题】A. Rewrite the following sentences after the models, using the structure “there is (no) room for...”. Model 1: There is not enough space for a drive-thru window, or for seating inside. There is no roo...
【多选题】物业管理工作自身的特点决定了物业服务合同签订时，除了遵循签订一般合同时的注意事项外，还要注意的要点包括( ).
A.
“宜细不宜粗”的原则
B.
不应有无偿无限期的承诺
C.
实事求是留有余地
D.
保证企业财务管理的总体目标
E.
明确界定违约责任与处理方式
【单选题】There would be more joy in life if we were to accustom ourselves to use all the beautiful colors we can in fashioning our own clothes. The dress of the future will use drapery to a great extent and wi...
A.
it is harder to choose nice dress for men than for women
B.
historical costume was neither beautiful nor appropriate
C.
nobility of dress would help improve the quality of art
D.
the double waistcoats perpetuated in marble are dead
【单选题】He finds it difficult to himself to the climate here．
A.
account
B.
accustom
C.
apply
D.
adopt
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