The most common instrument used to measure diesel engine exhaust pressure is the （）

A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.

Radiation fog is more commonly encountered in（）.

The fog most commonly encountered at sea is called（）.

（）is the most widespread type likely to be encountered at sea and is caused by relatively warm air being cooled by flowing over a cooler sea surface.

Which one of the following is the most commonly used layer 2 network device?（）

A rescuer can most easily determine whether or not an adult victim has a pulse by checking the pulse at the（）.

The separate supplies are connected in either star or delta formationThe star formation is most commonly used and requires（） slip-rings on the alternator.

The star formation is most commonly used and requires（） on the alternator.

Steam fog is most likely to occur on the Mississippi and Ohio Rivers in（）.

航海通告

Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.