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【单选题】
Look at the smog (雾霾), ▁▁▁ bad weather it is!A.
what
B.
what a
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反馈参考答案：
举一反三
【简答题】In the circuit below, let【图片】 have a peak value of 10 V and R = 1 kΩ. The peak value of【图片】is mA【图片】
【简答题】In the circuit below, the diode is ______ biased. When applying ideal mode for the diode, Uo1=______ V . When applying constant forward voltage mode, Uo1=________V.
【简答题】In the circuit below, let【图片】 have a peak value of 10 V and R = 1 kΩ. The peak value of【图片】is mA【图片】
【简答题】6 After 8 minutes in a batch reactor, react(C A0 =1mol/liter) is 80% converted; after 18 minutes, conversion is 90%. Find a rate equation to represent this reaction.
【单选题】During UMS rounds, a duty engineer notices that the fuel oil overflow observation glass is full of oil. Should he ____.
A.
Stop all F.O. transfers immediately, and inform the chief engineer.
B.
Make a sounding of the F.O. overflow tank and decide if there is enough capacity to leave it until the following morning.
C.
Call a motorman and have him sound the F.O. overflow tank periodically during the night.
D.
start the F.O. purifier
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