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Open ullage holes in tanks which are not gas-free must be protected by（）.
A . PV valves
B . warning signs
C . flame screens
D . stop-check valve
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In some type of two-stroke engines, besides some small holes for（）, starting valve, safety valve, indicator cock, and central opening in each cylinder cover for mounting the（）
A . fuel valves；exhaust valve
B . exhaust valves；inlet valve
C . fuel valves；inlet valve
D . exhaust valves；fuel valve
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The Labor Party had its origins in the（）which was formed in January,1893.
A . Independent Labor Party
B . Grand National Consolidated Trade Union
C . Amalgamated Society of Engineers
D . Trade Union Congre
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If the piston groove drain holes for the oil control rings become clogged, which of the following is likely to occur?（）
A . The oil control rings will seal improperly and wear rapidly
B . The piston will overheat due to insufficient lubrication
C . Excessive oil will remain on the cylinder wall
D . Light brown smoke will emanate from the engine exhaust
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In particular,which is not included in the Navigation System?（）
A . ECDIS
B . RADAR
C . GPS
D . GMDSS
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In plugging submerged holes on a vessel，rags，wedges，and other materials should be used in conjunction with plugs to（）.
A . reduce the water pressure on the hull
B . reduce the water leaking around the plugs
C . prevent progressive flooding
D . reduce the possibility of stress fracture
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Which of the following is the closet in meaning to "committed" in PAPAGRAPH 9?
A . Engaged
B . Devoted
C . Respected
D . Promised
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Which of the following is the closest in meaning to "pep up" in the last paragraph?
A . Cheer up
B . Feed up
C . Steer up
D . Take up
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Which statement correctly describes a situation in which VRFs are used in the data center?（）
A . Partitioning of network resources is enabled.
B . VRFs cannot support path isolation from MAN/WAN designs.
C . VRFs cannot be used to map a virtualized data center to a MPLS implementation.
D . VRFs do not allow for the use of application services with multiple access topologies.
E . An access design using a VRF allows for an aggregation layer service module solution.
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In each cylinder cover there are two or three holes for （）
A . the exhaust valves
B . the fuel valves
C . indicator cocks
D . the fuel pum
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In each inflatable liferaft，what equipment is provided to make quick，emergency，temporary repairs to large holes in the raft? （）
A . No equipment is provided
B . Glue and rubber patches
C . Several various-sized sealing clamps
D . Self-adhesive rubberized canvas patche
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Holes in the bulwark,Which allow deck water to drain into the sea, are（）.
A . doggers
B . fidleys
C . freeing ports
D . swash port
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Which of the following options lists the steps in PPP session establishment in the correct order?（）
A . Optional authentication phase, link establishment phase, network layer protocol phase.
B . Network layer protocol phase, link establishment phase, optional authentication phase.
C . Network layer protocol phase, optional authentication phase, link establishment phase.
D . Link establishment phase, network layer protocol phase, optional authentication phase.
E . Link establishment phase, optional authentication phase, network layer protocol phase.
F . Optional authentication phase, network layer protocol phase, link establishment phase.
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The way in which native speakers write something is certainly the same way in which they say it.
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Which country was the fountain in?
A、England
B、America
C、The text doesn't say
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Which is negative in meanings in the following idioms?
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In the following love stories, which is not mentioned in the teaching video?
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Which parts of the body occupy the largest parts in the corresponding motor cortex in the brain?
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Which of the following is included in the price？
A．Airport facility charges.
B．Government taxes.
C．Departure taxes.
D．Meals and beverages.
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Which of the following is mentioned in the passage？
A．Teachers are well paid at Deep Springs.
B．Students are mainly from New York State.
C．The length of schooling is two years.
D．Teachers needn’t pay for their rent and meals.
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Which step was NOT included in the immediate actions in the article？
A．Shifted the wet medical equipment to dry place
B．Informed the warehouse Manager of the incident at once
C．Dried the wet equipment with blankets
D．Did some casual mending to the roof
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Which of the following is suggested in the passage？
A．Though the man had some trouble, he got the necklace without paying cash.
B．Nobody noticed the man take the necklace with him.
C．The manager never thought an old man would be a thief.
D．The thief always stole things in famous jewelry shops.
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在水合物中水分子形成了多面体骨架,其中有孔穴，孔穴体积由气体分子所占据，即水合物是一种笼形包合物，水分子借氢键结合成笼形晶格,气体分子则在范德华力作用下，被包围在晶格中。In the hydrate, water molecules form a polyhedral skeleton with holes in which the volume is occupied by gas molecules. In other words, hydrate is a kind of cage inclusion, water molecules are bonded by hydrogen bonds to form a cage lattice, and gas molecules are surrounded in the lattice under the action of van der Waals force.
