更多"[单选题]Lubrication often has to perfo"的相关试题:
[单选题]A lubricantoften has to perform many duties in any one situation,inaddition to its fundamental job of reducingV
A.speed
B.inertia force
C.friction
D.resistance
[单选题] An LWT anchor often has difficulty tripping in ______．
A.Sand
B.Soft soil
C.Stiff clay
D.Heterogeneous soil
[单选题]Nowadays many teenagers often take their parents’ love for granted. Seldom________ what they should do in return.
A.do they think
B.they think
C.did they think
D.think they
[单选题]APU有几根转动轴（ ） How many shafts has the APU?
A.only one 1
B.two 2
C.three 3
[单选题]A330飞机驾驶舱有几部时钟（ ）
How many clocks has the A330 aircraft cockpit ( )
A.1部
1
B.2部
2
C.3部
3
[单选题] The restaurant has lost many customers due to (由于) it’s poor _( )_ .
A. service
B. serving
C. services
D. servicing
[多选题]Concerning the rights and duties of an independent state, it is commonly accepted that those are integral elements of a truly independent states, including:
A. The right to exercise jurisdiction over its territory and permanent population.
B. The right to engage upon an act of self.defense in certain situations.
C. Not to intervene in the internal affairs of other sovereign states.
D. Not to enforce its laws in the territory of another state.
[单选题] Refrigeration machinery is often surveyed before loading reefer cargo．This survey is usually performed by the ______．
A.MSA
B.CCS
C.CCIQ
D.Local port authority
[单选题] When steering by autopilot how often should manual steering be checked ?
A. Every day
B. When time allows
C. At least once a watch
D. No checking is necessary
[单选题] People often end their letters with "Yours _( )_ "
A. truly
B. true
C. very
D. real
[单选题]In motorships,an exhaust gas boiler is often used to some of the heat carried in the exhaust gases from the main engine
A.finish
B.mnake
C.recover
D.take
[单选题] What often happens when using echo-sounder at river estuary where a layer of fresh water lies on the top of denser salt water?
A.A scattering layer appears.
B.Echo sounder stops working.
C.shallow water appears.
D.Nothing abnormal happens.
[单选题]between the holds,often on a platform which can be rotated through 360,the deck crane provides an immediately operational unit requiring only one man to operate it.
A.Positioning
B.Positioned
C.To position
D.Which positioned
[单选题] Tony often _( )_ with his wife about money.
A. argues
B. interviews
C. embarrasses
D. improves
[单选题] We often __( )_ the happy time we spent at your home last summer.
A. recall
B. remind
C. present
D. provide
[单选题]常装磁堵为（ ）Often with magnetic wall for:
A.唯一的主磁堵. The only main magnetic plug
B.内、外齿轮箱磁堵和主磁堵. Internal and external magnetic gear box wall and the main magnetic plug
C.在外部齿轮箱在主磁堵. In the external gear box in the main magnetic plug
[单选题] Do you often _____ until tomorrow what you should do today?
A. put away
B. put down
C. put up
D. put off
[单选题]This machine___out of order very often,but now it works well.
A.was used to be
B.was used be
C.used to be
D.used be
