更多"Current flowing in only one directi"的相关试题:
[单项选择]The current flowing first in one direction and then in another is called（） current.
A. an alternating
B. a rush
C. a direct
D. an exciting
[多项选择]The network security policy requires that only one host be permitted to attach dynamically to each switch interface. If that policy is violated, the interface should shut down. Which two commands must the network administrator configure on the 2950 Catalyst switch to meet this policy (Choose two.)（）。
A. Switch1(config-if)# switchport port-security maximum 1
B. Switch1(config)# mac-address-table secure
C. Switch1(config)# access-list 10 permit ip host
D. Switch1(config-if)# switchport port-security violation shutdown
E. Switch1(config-if)# ip access-group 10
[单项选择]A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.
A. can’t be controlled very precisely
B. can’t be controlled as flexibly as the separate pump system
C. can be controlled as flexibly as the separate pump system
D. can be controlled more precisely and flexibly
[单项选择]Current changing in direction and rising and falling in value is （）.
A. AC
B. DC
C. generator
D. fresh water generator
[单项选择]The Humboldt Current flows in which direction?（）
A. North
B. South
C. East
D. West
[单项选择]If the current and wind are in the same direction，the sea surface represents a wind speed （）.
A. lower than actually exists
B. higher than actually exists
C. that actually exists
D. that has no proportional relationship
[单项选择]When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be （）.
A. dry
B. wet
C. super-cooled
D. superheated
[单项选择]While flowing through the volute in a centrifugal pump, part of the （） energy of the liquid is converted to （） energy.
A. kinetic；pressure
B. kinetic；essential
C. pressure；kinetic
D. pressure；height
[单项选择]Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the（）.
A. Alaska Current
B. Subarctic Current
C. Kuroshio Current
D. Oyashio Current
[单项选择]Blood flowing from a cut artery appears（）.
A. dark red with a steady flow
B. bright red with a steady flow
C. bright red and in spurts
D. dark red and in spurts
[单项选择]The liquid flowing in the capillary is such that the difference in （） readings taken before the capillary and after it is related to the oil viscosity.
A. pressure
B. velocity
C. flow rate
D. temperature
[单项选择]（）is electricity that is flowing where it’s not supposed to through water, fittings on your boat, wet wood, damp surfaces, etc.
A. Stray current
B. Rated current
C. Starting current
D. Earth current
[单项选择]A whistle signal of one prolonged，one short，one prolonged and one short blast，is sounded by a vessel（）.
A. at anchor
B. towing a submerged object
C. being overtaken in a narrow channel
D. in distress
[单项选择]A signal of one prolonged，one short，one prolonged，and one short blast，in that order is given by a vessel（）.
A. engaged on pilotage duty
B. in distress
C. at anchor
D. being overtaken in a narrow channel
[单项选择]An overtaking situation would be one in which one vessel is approaching another from more than how many degrees abaft the beam? （）
A. 0°
B. 10°
C. 22.5°
D. None of the above
[单项选择]During one synodic rotation，a body makes one complete turn relative to the（）.
A. Earth
B. Sun
C. stars
D. vernal equinox
[单项选择]The ship which strikes any other vessel is called the（）.
A. Ship in the wrong
B. Responsible vessel
C. Vessel to be responsible
D. Wrong ship
