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black ball（）
- A、黑柱体
- B、黑球体
- C、黑锥形体
- D、黑菱形体
参考答案
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Do you know that gentleman ( )?
A. dressing the black suitB. in a black suitC. wears a black suitD. with the black suit
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Judging from this passage, people of the Middle Ages probably ______.A. treated black cats with respectB. treated black cats badlyC. were witches if they had black catsD. thought black cats were beautiful
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People of ancient Egypt and Europeans of the Middle Ages ______.A. both worshipped black catsB. both feared black catsC. thought black cats could bring good luckD. felt very different about black cats
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( ) is expert in ( ).
A、The Doctor Black/ surgeryB、Doctor Black/ the surgeryC、A Doctor Black/ the surgeryD、Doctor Black/ surgery
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Which of the following statements about Black English is untrue?
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WhichofthefollowingisthecorrectwiringorderforanRJ－11twolinejack?()
A.Black，Green，Red，YellowB.Black，Red，Green，YellowC.Red，Black，Green，YellowD.Yellow，Red，Green，Black
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A vessel engaged in minesweeping on the high seas carries which of the following day signals ?A.Two green balls in a vertical lineB.Two black balls in a vertical lineC.A black ball at the foretruck and yardarm endsD.A shape of two cones point to point
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共用题干
Black Holes1 Black holes can be best described as a sort of vacuum,sucking up everything in space.Scientists have discovered that black holes come from an explosion of huge stars.Stars that are near death can no longer burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.2 Black holes come from stars ihat are made of hydrogen,other gases and a few metals.When these explode it can turn into a stellar-mass（恒星质量) black hole , which can only occur if the star is large enough (should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact every piece into the tiniest particle.Try to see and compare:if a star that's ten times the size of the sun ends up being a black hole that's no longer than 70 kilometers,then the Earth would become a black hole that'S only a fraction of an inch!3 Objects that get sucked in a black hole will always remain there,never to break free.i1it remember that black holes can only gobble up（吞噬）objects within a specific distance to it.It's possible for a large star near the sun to become a black hole,but the sun will continue to stay in place.Orbits（轨道）do not change because the newly formed black hole contains exactly the same amount of mass as when it was a star, only this time its mass is totally contracted that it can end up as no bigger than a state.4 Sofar,astronomers have figured out that black holes exist because of Albert Einstcin's theory of relativity.In the end,through numerous studies,they have discovered that black holes truly exist.Since black holes trap light and do not give off light,it is nearly impossible to detect black holes via a telescope.But astronomers continue to study galaxies（银河系）, space and the solar system to understand how black holes might evolve.It is possible that black holes can exist for millions of years,and later contribute to a bigger process in galaxies,which can eventually lead to creation of new entities（实体）.Scientists also credit black holes as helpful in learning how galaxies began to form.Paragraph 1________A:What Happens to the Objects Around a Black Hole?B:Is There Proof That Black Holes Really Exist?C:How Were Black Holes Named?D:What Are Different Types of Black Holes?E:What Are Black Holes Made of? F: How Are Black Holes Formed?
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下列哪一项是css正确的语法构成（）。A、body：color=blackB、{body；color：black}C、body{color：black；}D、{body：color=black（body}
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What is the requirement of Remote Triggered Black Hole （RTBH ） filtering？（）A、IBGP updates exchange between trigger router and black hole routerB、EBGP updates exchange between trigger router and black hole routerC、OSPF updates exchange between trigger router and black hole routerD、ISIS updates exchange between trigger router and black hole router
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Which of the following is the correct wiring order for an RJ-11 two line jack？（）A、Black，Green，Red，YellowB、Black，Red，Green，YellowC、Red，Black，Green，YellowD、Yellow，Red，Green，Black
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单选题The Coordinator Surface Search in a SAR situation should display by day（）.A
the code flags FRB
a black ball over a black diamond shapeC
code flag Quebec over a black ballD
two black diamond shapes in a vertical line
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单选题Jackie Robinson, the first Black American who was to play baseball in the majorleagues, joined the Brooklyn Dodgers in 1947.A
the first and a Black American whoB
was the first Black AmericanC
the first Black AmericanD
the Black American who first
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单选题What best describes an anchor buoy（）.A
A black ball that is hoisted when the ship anchorsB
A buoy attached to the anchorC
A buoy attached to the scope of an anchor chainD
A mark of the number of fathoms in an anchor chain
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单选题In order for the automatic lifeboat drain to operate properly（）.A
the cap should be removed to drain the boat when it is waterborneB
the cage must be free of rubbish or the ball may not seat properlyC
there is an automatic ball check located in a siphon tubeD
the small lever to release the rubber ball float must be turned counterclockwise
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单选题A vessel not under command shall display（）.A
two red lights at night and two black balls during daylightB
two red lights at night and three black balls during daylightC
three red lights at night and two black balls during daylightD
three red lights at night and three black balls during daylight
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单选题We have some white and blue paint, but we （）.A
have black paintB
has black paintC
haven’t black paintD
hasn’t black paint
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单选题关于克隆影片剪辑实例的语句命令duplicateMovieClip（“ball”， “ball”+2，1），该语句完成的功能是（）。A
将舞台上的实例ball克隆，将生成的实例命名为ball并放置在第1层B
将舞台上的实例ball克隆，将生成的实例命名为ball2并放置在第1层C
将舞台上的实例ball克隆，将原来的ball实例删除D
将舞台上的实例ball克隆，将原来的ball实例重新命名为ball2
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单选题Which display indicates a vessel conducting mineclearance operations（）.A
Three balls in a vertical lineB
Two balls in a vertical lineC
One ball near the foremast and one ball at each yardarmD
One diamond near the foremast and one ball at each yardarm
考题
单选题Generally speaking, men play ball games much better than women because ______.A
men play ball games more often than womenB
men love ball games more than women doC
men’s hand and eye movements are quicker in responseD
men have a smaller number of nerves in their brains than women
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单选题A vessel conducting mine clearing operations will show（）.A
three balls in a vertical lineB
two balls in a vertical lineC
one ball near the foremast and one ball at each fore yardD
one diamond near the foremast head and one ball at each fore yard
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单选题A vessel is fishing at anchor on the high seas. Which of the following day signals should she display if she has gear extending out over 150 meters horizontally from the vessel?（）.A
A black ball in the forepart of her vesselB
A black double frustum of a coneC
A basket where best seenD
A black cone point upwards
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单选题Why did the boss send Mr. Black to China on business?A
Mr. Black had never been to China before.B
Mr. Black was an able and hard-working man.C
Mr. Black could buy something interesting for Tony.
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