The gigantic explosion that occurred a hundred years agoA. has remained a puzzleB. lacks sufficient evidenceC. is a university professorD. was generated by the explosionE. will kill many animalsF. are attacked by aliens

The gigantic explosion that occurred a hundred years ago

A. has remained a puzzle
B. lacks sufficient evidence
C. is a university professor
D. was generated by the explosion
E. will kill many animals
F. are attacked by aliens

参考解析

解析:

相关考题:

The book shows the very interesting ________ between life now and life a hundred years ago.A contrastB contactC contractD controversy

The traffic accident _________ three days ago. A、was happenedB、took placeC、was occurred

Ten years ago he was sent into ( ). A、the prisonB、prisonsC、prisonD、a prison

The traffic accident()three days ago.A. happensB. took placeC. was occurred

His father gave up smoking two years ago . 学科网A. enjoyed B. failed C. stopped 学科 His father gave up smoking two years ago .A. enjoyed B. failed C. stopped

Edison invented the light bulb many years ago(改为被动语态)The light bulb__________ __________by Edison many years ago.

The new hotel built a few months ago is large enough to( )over two hundred people.A.containB.holdC.provideD.accommodate

Although this child is only sixteen years old,he is so( )hundred dollars.A.thriftyB.economicalC.financialD.economic

The tower remains intact even after two hundred years.A:unknownB:unusualC:undamagedD:unstable

Little help seems to_____ the disaster-hit area since the explosion took place 3 hours ago.A.offerB.have been offeredC.be offeredD.have offered

The giganticexplosion that occurred a hundred years agoA. has remained a puzzleB. lacks sufficient evidenceC. is a university professorD. was generated by the explosionE. will kill many animalsF. are attacked by aliens

Tunguska Event  1 A hundred years ago this week, a gigantic explosion ripped (撕裂) open the day y above a forest in western Siberia, leaving a scientific riddle that endures to this day.  2 A dazzling light pierced the heavens, followed by a shock wave as strong as 1,000 atomic bombs. The explosion flattened 80 million trees across an area of 2,000 square kilometers. The fireball was so great that, a day later, Londoners could read their newspapers under the night sky. What caused the so-called Tunguska Event, named after the nearby Podkamennaya Tunguska River, still remains a mystery.  3 Experts suspect it was a rock that, after traveling in space for millions of years, was destined to crash to Earth at exactly 7:17 a.m. on June 30, 1908. This possibility worries scientists. “Imagine an unspotted asteroid (小行星) hitting a significant chunk(块) of land ... and imagine if that area, unlike Tunguska, were populated,” the British science journal Nature commented recently.  4 But no fragments of the “rock” have ever been found. Finding such evidence would be important, for it would increase our knowledge about the risk posed by dangerous Near Earth Objects (NEOs), say Italian researchers Luca Gasperini, Enrico Bonatti and Giuseppe Longo. When the next Tunguska NEO approaches, scientists will have to decide whether to try to deflect (使偏转) it or blow it up in space.  5 However, several rival theories for the Tunguska Event exist. Wolfgang Kundt, a professor at Germany's Bonn University, believes the Tunguska Event was caused by a massive escape of 10 million tons of methane(甲烷)-rich gas from deep within earth's crust. Some people hold that the explosion was caused by an alien spaceship crash, or a black hole in the universe.文章(23~30) Paragraph 2A. Competing ExplanationsB. Unknown AttacksC. Mysterious ExplosionD. Star WarE. Importance of Finding EvidenceF. Explanation that Worries Scientists

Edgar began()as an office boy years ago.AjobBworkCpositionDoccupation

When did you move to America?()AThree years ago.BAbout three years.CNext year.DThis year

They have learned about()in recent years.A、several hundreds English wordsB、hundreds of English wordsC、hundred of English wordsD、several hundred English words

The Hundred Years’ War and its consequences.

单选题The explosion occurred on the tanker when ______.Ashe was struck by lightningBtwo seamen were workingCshe was unloading her oilDthe fog began to clear up

单选题When was paper first created?AAbout 2000 years ago.BIn the 19th century.CAbout 1000 years ago.DIn the 11th century.

单选题A few hundred years ago news did not _____.Areceive attentionBtravel fastCspread to other countriesDtake long to reach other countries

单选题If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?()AThe cylinder indicator cocks should be openedBThe sump lube oil scavenge pump should be secured immediatelyCThe explosion relief valves should be manually openedDThe crankcase should remain unopened until the engine has cooled

单选题Why the explosion occurred was _____ the laboratory attendant had been careless.AforBbecauseCsinceDthat

单选题We know from this passage that over one hundred seventy years ago ______.Ano women worked outside their homesBwomen were considered as children by the lawCwomen cared nothing about how their family lives wereDwomen were not allowed to decide how to spend their money or how to teach children

单选题More than two hundred years ago the United States _____ from the British Empire and became an independent country.Agot offBpulled downCbroke awayDdropped off

问答题练习17  Five hundred years ago, news of important happenings—battles lost and won, kings or rulers overthrown or killed—took months and even years to travel from one country to another. The news passed by word of mouth and was never accurate. Today we can read in our newspapers of important events that occur in faraway countries on the same day they happen.

单选题When was the first story about the monster told?A200 years ago.BOver 500 years ago.CIn 1933.DIn 1960.

问答题The Hundred Years’ War and its consequences.

问答题Practice 14  Five hundred years ago, news of important happenings—battles lost and won, kings or rulers overthrown or killed—took months and even years to travel from one country to another. The news passed by word of mouth and was never accurate. (1) Today we can read in our newspapers of important events that occur in faraway countries on the same day they happen.