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【单选题】
白色PbSO 4 固体粉末投入到Na 2 S溶液中转变为黑色PbS沉淀,有关化学反应为PbSO 4 ____ +S 2 - = PbS____+ SO 4 2 - ,则该反应的平衡常数为 已知K sp θ ____=2.5×10 -8 ,K sp θ ____=2.5×10 -27A.
10 -19
B.
10 19
C.
6.25×10 -35
D.
1.6×10 34
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【单选题】In automotive electronics, is a generic term for any embedded system that controls one or more ofthe electrical system or subsystems in a transport vehicle.
A.
crank sensor
B.
knock sensor
C.
ECU
D.
throttle body
【简答题】为什么说社会主义是在曲折中前进的？
【单选题】In an alternating current electrical system, a low system power factor is a direct sign of （）
A.
wasted energy
B.
efficient operation
C.
a short in the exciter field windings
D.
an excessive number of minor system grounds
【简答题】The automotive electrical system is the most important support system of a modern car or truck. Imagine your personal vehicle without an electrical system. The gasoline engine would not run. Electrici...
【单选题】which item is not included in the part of electrical system?
A.
head light
B.
alternator
C.
cylinder
D.
heater
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