英译汉：wind vane

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• The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.

  A . temperature B . density C . deflection D . speed

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• A WIND BLOWS ROUND ANTICLOCKWISE defines（）.

  A . Backing (of wind) B . Beach (to) C . Veering (of wind) D . Maintaining direction of the wind

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• It is possible to mount a double suction centrifugal pump impeller with the vanes facing in the wrong directionThis would cause the pump （）.

  A . head capacity to improve B . discharge to be reversed C . efficiency to decrease D . slippage to decrease

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• As for a hydraulic vane pump, which of the following is in contact with the vanes during working: （） (1)the rotor (2)the pump shaft (3)the external surface of the housing

  A . (1) only B . (2) only C . (1) and (2) D . (1),(2)and(3)

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• When force of winds reaches 10-11 in Beaufort scale，we usually call such wind（）.

  A . Gale B . Storm C . Hurricane D . Typhoo

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• Cooling water pumps driven by direct reversing diesel engines are usually of the straight impeller vane type pump with a concentric housing to（）

  A . facilitate bi-directional operation B . provide the greatest pump efficiency C . prevent pump clogging from marine growth D . prevent cavitation at the pump outlet

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• A wind blows round anticlockwise defines（）.

  A . backing ( of wind ) B . beach ( to ) C . veering ( of wind ) D . maintaining direction of the wind

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• 在winD.owsXP系统下，（）就可以上网了。

  A . 需要安装PPPoE软件及进行相关设置 B . 需要安装PPPoE软件，无需进行相关设置 C . 无需安装任何PPPoE软件，只需进行相关设置 D . 无需安装任何PPPoE软件及进行相关设置

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• The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.

  A . must be from dead ahead B . speed must be zero C . must be from dead astern D . must be on the beam

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• 风蚀预报方程 wind erosion prediction equation

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• When a hydraulic vane pump is working, which of the following is in contact with the vanes?（） (1) the rotor (2) the internal surface of the housing (3) the external surface of the housing

  A . (1) only B . (2) only C . (1) and (2) D . (1), (2) and (3)

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• A centrifugal impeller consists of a number of vanes curving （） from the direction of rotation.

  A . backwards B . forwards C . upward D . downward

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• As for a hydraulic single action vane pump, the inner wall of the stator is usually of （） shape.

  A . circular B . elliptical C . rectangular D . hexago

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• What will a veering wind do（）.

  A . Change direction in a clockwise manner in the Northern Hemisphere B . Circulate about a low pressure center in a counterclockwise manner in the Northern Hemisphere C . Vary in strength constantly and unpredictably D . Circulate about a high pressure center in a clockwise manner in the Southern Hemisphere

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• The gear, screw, and vane pumps are all classified as （）.

  A . variable stroke pumps B . multistage pumps C . positive displacement pumps D . triple-ported pum

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• 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 relationshi

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• 在Winds中cipher命令的功能是（）

  A . 加密和解密文件和文件夹 B . 打开“文件签名验证”对话枢 C . 查找计算机中病毒 D . 修复被病毒破坏的文件和文件夹

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• Backing means the wind（）.

  A . is changing clockwise in direction B . is changing anticlockwise in direction C . is changing cyclonically or variably in direction D . remains unchanged in direction at the time

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• Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? （） (1) reciprocating (2) vane (3) gear

  A . （1）only B . （1）and（2） C . （1），（2）and（3） D . （2）and（3）

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• New advances in wind-turbine design enable turbines to operate at lower wind speeds to convert wind ________ electricity more efficiently.

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• We can perhaps describe the west wind in Ode to the West wind with all the following terms except ___.

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• Renewable energy includes wind power.

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• Der Wind ______.

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• n. very strong wind大风

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