The bearings used to support the crankshaft are generally called （）

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

[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]The main bearings are provided with thin-walled （）, lined with a copper-lead alloy.A . steel guidesB . steel shellsC . steel bearing capsD . pig iro

[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

[主观题]Ifthestudentscannotsupportthemselvesduringtheirstudyinuniversity，theymayaskforastudent_______fromthegovernment.A.menuB.spoonC.loanD.bond

[单选题]________________[A] support [B] cry [C] plea [D] wish

[名词解释] 英译中：Executive support system

[主观题]D．oes C# support multiple inheritance?(C#支持多重继承吗)

[单选题]PTK is used toA．locate one’s birth place.B．promote genetic research.C．identify parentchild kinship.D．choose children for adoption.

[单选题]PTK is used toA．locate one’s birth place.B．promote genetic research.C．identify parentchild kinship.D．choose children for adoption.