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【单选题】

The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the ()

A、direction of air flow within the cylinder

B、sequence of port opening

C、method of opening exhaust ports

D、volume of air admitted to the cylinder

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第2题

A、The principal protective coating is paint.  B、The principal protective coating is cement wash.  C、The principal protective coating is bitumen.  D、The principal protective coating is varnish.  

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第3题

A、principles  B、principals  C、principality  D、prince  

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第5题

A、the difference between the current candidate configuration and the candidate configuration from one commit ago  B、the difference between the current active configuration and the current candidate configuration  C、the difference between the current active configuration and the active configuration from one commit ago  D、the difference between the current candidate configuration and the archived configuration from one commit ago  

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第6题

A、the difference between the current candidate configuration and the candidate configuration from one commit ago  B、the difference between the current active configuration and the current candidate configuration  C、the difference between the current active configuration and the active configuration from one commit ago  D、the difference between the current candidate configuration and the archived configuration from one commit ago  

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第7题

A、the difference between the current candidate configuration and the candidate configuration from one commit ago  B、the difference etween the current active configuration and the active configuration from the one commit ago  C、the difference between the current active configuration and the active configuration from one commit ago  D、the difference between the current candidate configuration and the archived configuration from one commit ago  

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第9题

A、depth of water at a specific time due to tidal effect  B、difference between the depth of the water and the area's tidal datum  C、difference between the depth of the water and the high water tidal level  D、difference between the depth of the water at high tide and the depth of the water at low tide  

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