slideUp（）方法的speed属性可以是（）。A、300B、slowC、fastD、normal
slideUp（）方法的speed属性可以是（）。
- A、300
- B、slow
- C、fast
- D、normal
相关考题：
A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal .the probable ___.A.engine overloadB.leaky valvesC.stuck or broken piston ringsD.low air injection pressure
YoucreateaWebpagethatcontainsdrop-downmenusthataredefinedbyusingdivtagsinthefollowingcode.YouneedtowriteaJavaScriptfunctionthatwillenablethedrop-downmenustoactivatewhentheuserpositionsthemouseoverthemenutitle.Whichcodesegmentshouldyouuse？（）A.$（.dropdown-menu）.hover（function（）{$（.menu-items）.slideDown（100）；}，function（）{ $（.menu-items）.slideUp（100）；}）；B.$（.dropdown-menu）.hover（function（）{$（.menu-items，this）.slideDown（100）；}，function（）{$（.menu-items，this）.slideUp（100）；}）；C.$（.dropdown-menu）.hover（function（）{$（this）.slideDown（100）；}，function（）{$（this）.slideUp（100）；}）；D.$（.dropdown-menu）.hover（function（）{$（this.menu-title，）.slideDown（100）；}，function（）{$（this.menu-title，）.slideUp（100）；}）；
If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will .A.have a larger than normal dead bandB.produce excessive speed response to a load changeC.respond slowly to any change in engine loadD.stabilize engine speed at the new governor setting
The bearing of tailshaft sealing equipment which adopts the oil nature circulation is hot, the reason isA.the rotate speed fluctuationB.the ventilation tube cloggedC.the main engine accelerate so fastD.stormy waves
______is a precaution which contributes to avoiding trouble under normal operating conditions.A.Constant inspectionB.Keeping constant loadC.Remaining constant temperatureD.Varying speed
单选题A diesel engine is turned at normal cranking speed, but fails to fireThis can occur from （）Alow lube oil temperatureBlow starting air temperatureCair in the fuel injectionDwater in the starting air system
单选题The knock occurring when a cold diesel engine is started and continues while running at low speed, but stops when the engine reaches normal operating speed and temperature, is（）.Acaused by retarded injection timingBcaused by a mechanical defect in one cylinderCcaused by high fuel injection pressuresDnormal for these conditions
单选题（） is a precaution which contributes to avoiding trouble under normal operating conditions.AConstant inspectionBKeeping constant loadCRemaining constant temperatureDVarying speed
单选题A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）Aengine overloadBleaky valvesCstuck or broken piston ringsDlow air injection pressure
单选题If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.Acompression pressures are below normalBlube oil is diluted with fuel oilCcranking speed is too lowDexhaust system is partially restricted
单选题If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed（）Atoo lowBa little lowerCa little higherDexactly the same
单选题A four-stroke/cycle, 1000horsepower diesel engine fails to start at normal cranking speed with normal fuel pressure and ambient temperatureThe reason for the failure could be（）Aglazed liners or pistonsBhigh lube oil pressureCexcessive compression ratioDworn valve seats and valves
单选题If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）Aexcessive fuel pressureBhigh lube oil viscosityCinadequate fuel injectionDexcessive starting air pressure
单选题Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at （）Amaximum power at a normal loadBmaximum power and load under normal conditionsChalf speed and normal temperatureDnormal operating temperature without a load
单选题When attempting to restart a warm high-speed engine, which of the following reactions can you expect?（）AExcessive fuelBHigher than normal temperatures for star upCLonger starting periodsDHigher than normal lube oil pressure
单选题A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a （）.Aslow-speed dieselBmedium-speed dieselChigh-speed dieselDconstant-speed diesel
单选题A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of （）Alow lube oil temperatureBlow starting air temperatureCair bubbles in the fuel oil systemDwater in the starting air system
单选题_______ is a type of activity in which the teacher reads out a passage in normal speed for two or three times and students note down the words they could catch as they listen as much as possible.AAnswering questionsBGap-fillingCDictoglossDSequencing
单选题When ship is fouled, increasing the fuel injection for keeping the normal speed will cause the main engine （）Ato work as overload characteristicBoverspeedCover mechanical load onlyDover thermal load only
单选题If a cam-controlled engine has a normal injection pressure at rated speed,the injection pressure will be（）at slow speed.Aa little lowerBa little higherCtoo lowDexactly the same