The main bearings are provided with thin-walled （）, lined with a copper-lead alloy.

[单选题]Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.A．The direction of pressure on the journal in four-stroke engine is continuou

[单选题]Main bearings are required to support the crankshaft at each （）.A . endB . webC . pinD . journal

[单选题]The bearings used to support the crankshaft are generally called （）A . line shaft bearingsB . connecting rod beatingsC . main bearingsD . support bearing

[单选题]At 0715 you take the following bearings: Race Rock Light 328°pgc; Little Gull Island Light 249°pgc; Mt. Prospect Antenna 036°pgc. Based on your 0715 fix，which statement is TRUE?（）A . You are to the left of your track lineB . Your fathometer reads abo

[单选题]8．The boy is ________thin __________carry the big box．A． too; toB． to; tooC． too; tooD． to ;to

[主观题]H．e is the__________ (thin) student in our class．

[单选题]( )：The capability provided to the consumer is to use the provider’s applications runningon a cloud infrastructure,The applications are accessible from various client devicesthrough either a thin client interface, such as a web browser (e.g.,web-base

[单选题]The cylinder cover is not provided with ( )A．fuel valveB．the starting valveC．lubricator

[单选题]The cylinder cover is not provided with （）.A . fuel valveB . lubricatorC . indicator valveD . the starting valve

[单选题]The magnetic field is provided by electromagnets so arranged that adjacent poles have ___.A．opposite polarityB．the same polarityC．negative polarityD．positive polarity