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【单选题】
把反应Zn+Cu2→Zn2++Cu设计电池,电池符号为()。A.
(-)Zn|Zn2+||Cu2+|Cu(+)
B.
(-)Zn2+|Zn||Cu2+|Cu(+)
C.
(-)Cu2+|Cu|Zn2+|Zn(+)
D.
(-)Cu|Cu2+||Zn2+|Zn(+)
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【单选题】The battery-operated slippers are used for _____ in the dark. [ ]
A.
seeing
B.
see
C.
saw
D.
sees
【简答题】亚文化群主要包括
【单选题】Battery packs used in pacemakers are practiclal because they can supply power to a pacemaker for .
A.
exactly one year
B.
less than a year
C.
more than a year
D.
far beyond a year
【简答题】CA: I mean, those battery packs are incredibly heavy, but you think the math can still work out inteltly -- by combining light body, heavy battery, you can still gain ______efficiency.
【简答题】水力学的研究方法有()、()和()
【单选题】The battery packs used in electric and hybrid automobiles are one of the largest cost components for manufacturing these cars. As the price of these batteries decline, we expect that the:
A.
supply curve for electric and hybrid autos will shift rightward.
B.
supply curve for electric and hybrid autos will shift leftward.
C.
demand curve for electric and hybrid autos will shift rightward.
D.
demand curve for electric and hybrid autos will shift leftward.
【单选题】Battery-operated slippers are used for _______ and were invented by _______. [ ]
A.
seeing in the dark; Chelsea Lanmon
B.
seeing in the dark; Julie Tompson
C.
scooping really cold ice cream; Jayce Coziar
D.
changing the style of the shoes; Jamic Ellsworth
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