The flash point of a liquid refers to the temperature （）

A . B flammable liquid B . C flammable liquid C . D combustible liquid D . E combustible liquid

A . There shall be at least 3 ventilator ducts open to the atmosphere B . At least one exhaust duct shall extend from the open atmosphere to the lower portion of the bilge C . At least one intake duct shall extend from the open atmosphere to the lower portion of the bilge D . Only vessels using fuel with a flash point above 110°F need ventilate engine and fuel compartment

A . capacitor in series with the load B . inductor in series with the load C . capacitor and inductor in series with the load D . resistor in series with the load

A . Its IP address already exists. B . It is operating normally. C . It requires a code upgrade. D . It has lost contact with the controller.

A、DR plot B、track line C、heading D、estimated course

A . Needs to use Inverse ARP. B . Maps a single IP subnet per DLCI. C . Maps a single IP subnet across multiple DLCIs. D . Resolves NBMA (non broadcast multi access) split horizon issues. E . Requires use of the frame-relay map command. F . None of the above

A . metacenter B . geometric center of the waterplane area C . center of gravity D . center of flotatio

A . acts as a meeting place for sources and receivers of multicast traffic B . used in PIM dense m ode to create a database of all multicast sources C . used in PIM dense and sparse mode to create a database of all multicast sources D . acts as the designated router for a broadcast segment when multicast routing is enabled

A . B flammable liquid B . C flammable liquid C . D combustible liquid D . E combustible liquid

A . submerged rock，not dangerous to navigation B . sunken wreck，not dangerous to navigation C . towed-under buoy D . All of the above

A . aboat which the vessel lists and trims B . which coincides with the center of buoyancy C . which, in the absence of external forces, is always vertically aligned with the center of gravity D . which is shown in the hydrostatic tables as VCB

A . It has lost contact with the controller. B . It requires a code upgrade. C . It is operating normally. D . Its IP address already exists.

A . Hydraulic oil B . Lubricating oil C . Diesel oil D . Refrigeration oil

A . about which the vessel lists and trims B . which coincides with the center of buoyancy C . which，in the absence of external forces，is always vertically aligned with the center of gravity D . which is shown in the hydrostatic tables as VCB

A . It has lost contact with controller. B . Its IP address already exists. C . It requires a code upgrade. D . It is operating normally.

A . its ip address already exists. B . it is operating normally. C . it requires a code upgrade. D . it has lost contact with the controller.

A . it has lost contact with controller. B . its ip address already exists. C . it requires a code upgrade. D . it is operating normally.

A . for atomizing B . for centrifuging C . in a storage tank D . in the re-circulating line

A . It is lower than the ignition temperature B . It is the temperature at which a substance will spontaneously ignite C . It is the temperature at which a substance, when ignited, will continue to bum D . It is the temperature at which the released vapors will fall within the explosive range

A、Expressing agreement B、Asking questions C、Expressing disagreement D、Making guesses