Increasing differential pressure of an oil filter indicates that （）

[单选题]The pressure differential across a diesel engine lube oil system duplex filter should be checked to ________.A．determine the need for filter cleaningB．measure any change in oil viscosityC．prevent damage to the filterD．determine the need for batch fil

[单选题]An increased pressure differential between the inlet and outlet of a strainer usually indicates the strainer is （）A . holedB . fouledC . cleanD . dry

[名词解释] differential inhibition（分化抑制）

[名词解释] differential centrifugation （差速离心）

[名词解释] 微分反应性 differential reactivity

[名词解释] 差分备份（Differential Backup）

[名词解释] differential gene expression (差别基因表达)

[名词解释] differential-interference microscope（微分干涉显微镜）

[名词解释] 鉴别培养基（differential medium）

[单选题]Increasing the load on an engine equipped with a constant speed mechanical governor, will cause the engine speed to initially （）.A . increaseB . decreaseC . fluctuateD . remain constant