When wood is burnt, it heat and light, together with heavy smoke.

相似题目

• When the power of SART is on, it will（）.

  A . transmit distress signal B . send response signal C . transmit the signal of ship’s position D . be started by X-band radar

  查看最佳答案

• What is it called when it is possible to ignite the vapour above the oil?（）

  A . Flash point B . Boiling point C . Ignition point D . Pour point

  查看最佳答案

• A chain bridle is used when towing astern because it（）.

  A . is easy to connect B . provides an effective catenary and absorbs shock due to its weight C . makes rigging a swivel unnecessary D . prevents the tow from yawing by the drag of the chains in a seaway

  查看最佳答案

• Ammonia when used as a refrigerant is valuable because of its high efficiency, it is however （）.

  A . toxic B . flammable C . explosive D . all of the above

  查看最佳答案

• A vessel is “listed” when it is（）.

  A . down by the head B . down by the stern C . inclined due to off-center weight D . inclined due to wind

  查看最佳答案

• When visibility is restricted（），we can say it is restricted visibility.

  A . by long distance B . by the darkness at night C . by a vessel in front D . by fog or falling snow

  查看最佳答案

• When the（）is large, the ship is stiff; and when it is small, she is tender.

  A . GM B . free surface C . longitudinal center of gravity D . transverse center of gravity

  查看最佳答案

• When air is at its dew point it（）.

  A . will contain no additional moisture B . has the lowest relative humidity C . cannot keep up its moisture D . has a low absolute humidity

  查看最佳答案

• When separating the lube oil without additive, it is usually cleaned with hot water; the aim is to remove （） from it.

  A . acid B . sludge C . mechanical impurity D . salinity

  查看最佳答案

• A vessel is wind rode when it is（）.

  A . at anchor and heading into the wind B . backing into the wind C . carrying lee rudder D . necessary to apply a leeway correction to the course

  查看最佳答案

• 173. When air is at its dew point it ______ .

  查看最佳答案

• When there is a single word, it should be read in its weak form.

  查看最佳答案

• I wonder when it is going to begin.

  查看最佳答案

• It is common to experience culture shock when traveling abroad.

  查看最佳答案

• When a pencil is partly in a glass of water, it looks as if it ( ).

  查看最佳答案

• It is impolite to _____ a speaker when he is making a speech.

  查看最佳答案

• \Fruit is best when it is ___season.\ The blank should be \in\.( )

  查看最佳答案

• 117. A vessel is listed when it is ___

  查看最佳答案

• We can't get back time when it is gone.

  A．True B．False

  查看最佳答案

• When the mixture is used，it is important to________．．

  A.keep sugar and salt in water B.drink it as often as necessary C.take it as much as possible D.use it to kill the bacteria

  查看最佳答案

• When air is at its dew point it is at its______.

  A.lowest absolute humidity B.lowest relative humidity C.highest absolute humidity D.highest relative humidity

  查看最佳答案

• It is not as difficult to store information as it is to________it quickly when it is wanted again.

  A．represent B．retain C．restore D．retrieve

  查看最佳答案

• It is not good manners to somebody when he or

  A．apologise B．contribute C．disturb D．dispose of

  查看最佳答案