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2751．
adj.假裝的；假的；冒充的發(fā)布：2024/5/23 20:38:36組卷：0引用：5難度：0.72752．He's a s
man and told everything he'd seen.發(fā)布：2024/5/23 20:38:36組卷：1引用：2難度：0.72753．There's a lot of harm in trying something new!That's why we
drugs and cosmetics before mass production.發(fā)布：2024/5/23 20:38:36組卷：0引用：0難度：0.92754．Did you see the manager in the office？
Yes.He by a journalist from China Daily.（ ?。?/h2>發(fā)布：2024/5/23 20:38:36組卷：8引用：3難度：0.52755．There have been sightings of strange things in the sky since ancient times，but it was only in the middle of the 20th century that they acquired the name "unidentified flying object"，or UFO.During the 1940s and 1950s，there was a huge increase in sightings around the world.The timing of this first great UFO wave was significant，coming at a period of widespread public paranoia （妄想癥） caused by the nuclear arms race.The most common theory then was that UFOs were advanced military aircraft that had been developed in total secrecy.
Within a few decades，public views changed，thanks in part to Hollywood.Suddenly UFOs were no longer assumed to originate from Earth，but from another planet.Since then，the situation has been complicated by evidence for extraterrestrial （地球以外的） visitation，from rumours that governments are hiding information about their dealings with UFO occupants to apparent memories of alien abduction （綁架） recalled under hypnosis （催眠）.
In fact，in official circles， "unidentified flying object" means just that：an airborne object that hasn't been identified.To many ordinary people，however，UFO means "alien spacecraft".For this reason，the US military has started using the term UAP for unidentified aerial phenomena，to avoid appearing to talk about extraterrestrials every time they say they've seen something they can't explain.And UAP has another advantage，because UFOs may not always be literal "flying objects".Some may be people's imagination，unusual weather effects or even astronomical bodies.Therefore "aerial phenomena" is a much more appropriate term in these cases.
UFO and UAP do have one letter in common，and that's U，for unidentified.But it's important not to read too much into this.It doesn't automatically mean that what's been spotted came from another planet，or went against the known laws of physics.Electronic systems such as radar are designed to pick up particular types of known objects.Anything falling outside the expected parameters （參數(shù)） is likely to be classed as "unidentified".A number of UFO reports remain unexplained -but not necessarily extraterrestrial-even after careful investigation.
（1）What did the public usually relate UFOs to in the mid-1900s？
A．Psychological disorders.
B．Hollywood science fiction.
C．Creatures from other planets.
D．Aircraft developed by the army.
（2）Which of the following words can best describe the evidence for extraterrestrial visitation？
A．Fresh.
B．Unreliable.
C．Striking.
D．Insufficient.
（3）Why has the US military replaced the term UFO with UAP？
A．To avoid misunderstandings.
B．To stress the rule of scientific study.
C．To narrow the extent of UFO's meaning.
D．To highlight UFO's distinguishing features.
（4）What is the author's purpose in writing the last paragraph？
A．To illustrate how electronic systems detect UAP.
B．To encourage people to help explain UFO reports.
C．To give explanations for the meaning of "unidentified".
D．To call on people to stop voicing unnecessary concerns.發(fā)布：2024/5/23 20:38:36組卷：17引用：2難度：0.52756．
n.無(wú)行動(dòng)；不采取措施發(fā)布：2024/5/23 20:38:36組卷：2引用：1難度：0.72757．Nick finished what he was saying and jumped down from the
（講臺(tái)）.發(fā)布：2024/5/23 20:38:36組卷：4引用：1難度：0.82758．What does the man want to do？
A.Watch a Chinese traditional opera.
B.See a Chinese film
C.Break up with a foreign girl發(fā)布：2024/5/23 20:38:36組卷：0引用：1難度：0.02759．He put a
（梯子）against the wall so as to get the picture down.發(fā)布：2024/5/23 20:38:36組卷：2引用：2難度：0.72760．毫無(wú)疑問(wèn)，你會(huì)找到幸福和成功，如果你堅(jiān)持不懈。
that you will find happiness and success if you persevere.發(fā)布：2024/5/23 20:38:36組卷：7引用：2難度：0.5
