网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
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
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
参考答案
参考解析
解析：
更多 “The gigantic explosion that occurred a hundred years agoA. 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” 相关考题
考题
The book shows the very interesting ________ between life now and life a hundred years ago.A contrastB contactC contractD controversy
考题
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
考题
Edison invented the light bulb many years ago（改为被动语态）The light bulb__________ __________by Edison many years ago．
考题
The new hotel built a few months ago is large enough to（ ）over two hundred people.A.contain
B.hold
C.provide
D.accommodate
考题
Although this child is only sixteen years old,he is so（ ）hundred dollars.A.thrifty
B.economical
C.financial
D.economic
考题
The tower remains intact even after two hundred years.A:unknown
B:unusual
C:undamaged
D:unstable
考题
Little help seems to_____ the disaster-hit area since the explosion took place 3 hours ago.A.offer
B.have been offered
C.be offered
D.have offered
考题
The giganticexplosion that occurred a hundred years agoA. 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
考题
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 Explanations
B. Unknown Attacks
C. Mysterious Explosion
D. Star War
E. Importance of Finding Evidence
F. Explanation that Worries Scientists
考题
They have learned about（）in recent years.A、several hundreds English wordsB、hundreds of English wordsC、hundred of English wordsD、several hundred English words
考题
单选题The explosion occurred on the tanker when ______.A
she was struck by lightningB
two seamen were workingC
she was unloading her oilD
the fog began to clear up
考题
单选题When was paper first created?A
About 2000 years ago.B
In the 19th century.C
About 1000 years ago.D
In the 11th century.
考题
单选题A few hundred years ago news did not _____.A
receive attentionB
travel fastC
spread to other countriesD
take long to reach other countries
考题
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?（）A
The cylinder indicator cocks should be openedB
The sump lube oil scavenge pump should be secured immediatelyC
The explosion relief valves should be manually openedD
The crankcase should remain unopened until the engine has cooled
考题
单选题Why the explosion occurred was _____ the laboratory attendant had been careless.A
forB
becauseC
sinceD
that
考题
单选题We know from this passage that over one hundred seventy years ago ______.A
no women worked outside their homesB
women were considered as children by the lawC
women cared nothing about how their family lives wereD
women were not allowed to decide how to spend their money or how to teach children
考题
单选题More than two hundred years ago the United States _____ from the British Empire and became an independent country.A
got offB
pulled downC
broke awayD
dropped off
考题
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.
考题
单选题When was the first story about the monster told?A
200 years ago.B
Over 500 years ago.C
In 1933.D
In 1960.
考题
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.
热门标签
最新试卷