夹渣的分布与形状有单个点状夹渣、（）、链状夹渣和密集夹渣。
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To correct a hunting problem in a main propulsion diesel engine hydraulic governor, you should （）.
A. increase the governor oil pressure
B. adjust the speed droop setting
C. adjust the speeder spring travel
D. adjust the compensating needle valve
滤线器的作用原理是因为吸收原发射线．从而减少了续发射线即散射线对胶片的不良
A. 正确
B. 错误
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