单项选择题

No specific period is given for the renewal of the lubricating oil filter element as this should be done（） a figure of 0√7 bars is shown on the gauge.

A.whatever
B.whenever
C.wherever
D.whoever

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Modem engines make use of exhaust gas driven turbo-char...

单项选择题Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.

A.scavenging
B.starting
C.cooling
D.blowing

Modem engines （） exhaust gas driven turbo-chargers to s...

单项选择题Modem engines （） exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.

A.make use of
B.have made the use of
C.by means of
D.make advantage of

Modern engines （） exhaust gas driven turbo-chargers to ...

单项选择题Modern engines （） exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging.

A.are made of
B.are made from
C.make use of
D.are used to

船舶动力装置