Moderate Earthquake Strikes England
A moderate earthquake struck parts of southeast England on 28 April 2007, toppling chimneys from houses and rousing residents from their beds. Several thousand people were left without power1 in Kent County2. One woman suffered minor head and neck injuries.
“It felt as if the whole house was being slid across like a fim-fair ride, 3” said the woman.
The British Geological Survey said the 4.3-magnitude quake4 struck at 8:19 a.m. and was centered under the English Channel5, about 8.5 miles south of Dover6 and near the entrance to the Channel Tunnel7.
Witnesses said cracks appeared in walls and chimneys collapsed across the county. Residents said the tremor had lasted for about 10 to 15 seconds.
“I was lying in bed and it felt as if someone had just got up from bed next to me,” said Hendrick van Eck, 27, of Canterbury8 about 60 miles southeast of London. “I then heard the sound of cracking, and it was getting heavier and heavier9. It felt as if someone was at the end of my bed hopping up and down. ”
There are thousands of moderate quakes on this scale around the world each year, but they are rare in Britain. The April 28 quake was the strongest in Britain since 2002 when a 4.8-magnitude quake struck the central England city of Birmingham10.
The country’s strongest earthquake took place in the North Sea in 1931, measuring 6.1 on the Richter scale11. British Geologicisd Survey scientist Roger Musson said the quake took place on 28 April in an area that had seen several of the biggest earthquakes ever to strike Britain, including one in 1580 that caused damage in London and was felt in France.12 Musson predicted that it was only a matter of time13 before another earthquake struck this part of England. However, people should not be scared too much by this prediction, Musson said, as the modern earthquake warning system of Britain should be able to detect a forthcoming quake and announce it several hours before it takes place. This would allow time for people to evacuate and reduce damage to the minimum.
词汇：
moderate / ’mɒdərɪt / adj．中等的
topple / ’tɒpl / v．倾倒，震倒
tremor / ’tremə(r) / n．震动
fun-fair n．公共露天游乐场
forthcoming /,fɔ:θ’kʌmiŋ/ adj．即将来临的
geological /dʒɪə’lɒdʒɪkəl/ adj．地质的
magnitude / ’mægnɪtju:d /n．值，强度量
rouse / raʊz / v．唤醒
hop / hɒp /v．齐足跳起
scale / skeɪl / n．震级
evacuate / ɪ’vækjʊeɪt /v．疏散
注释：
1．power：电力
2．Kent County ：肯特郡（位于英格兰东南部）
3．It felt as if the whole house was being slid across like a fun-fair ride：它（地震）给人的感觉是整幢房子就像游乐场的滑行机一样在滑动。ride是“游乐场供人玩乐的乘坐式的活动装置”。as if是“好像……一样;仿佛”，例如：
He treated me as if I were his son.
他待我如同待他的儿子一样。
4．the 4.3-magnitude quake：里氏4.3级地震
5．English Channel：英吉利—峡
6．Dover：多佛尔（英格兰东南部港市）
7．Channel Tunnel：海峡隧道。Channel Tunnel（常简称为Chunnel）是连接英法两国的海峡隧。
8．Canterbury：坎特伯雷（英格兰东南部城市，中世纪时曾是zōng jiāo 朝圣圣地）
9．it was getting heavier and heavier：爆裂声越来越响
10．Birmingham：伯明翰（英格兰中部城市）
11．the Richter scale：里氏震级表。美国地震学家Charles Francis Richter（1900一1985）于1935年制定了地震震级表。
12．British Geological Survey scientist Roger Musson said the quake took place on 28 April in an area that had seen several of the biggest earthquakes ever to strike Britain, including one in 1580 that caused damage in London and was felt in France：英国地质勘测所的科学家Roger Musson说，这次4月28日遭遇地震的地区曾经遭受过英国最强烈的几次大地震，其中的一次大地震发生在1580年，那次地震蹂躏了伦敦，巴黎也能感到它的震波。
13．a matter of time：时间问题。又如：It’s not a matter of money.这不是个钱的问题。
The country’s strongest earthquake took place in London in 1580.
A:Right B:Wrong C:Not mentioned
Moderate Earthquake Strikes England
A moderate earthquake struck parts of southeastEnglandon 28 April 2007, toppling chimneys from houses and rousing residents from their beds. Several thousand people were left without power 1 in Kent County 2. One woman suffered minor head and neck injuries.
“It felt as if the whole house was being slid across like a fim-fair ride, 3” said the woman. The British Geological Survey said the 4.3-magnitude quake 4 struck at 8:19 a.m. and was centered under the English Channel 5, about 8.5 miles south ofDover 6 and near the entrance to the Channel Tunnel 7.
Witnesses said cracks appeared in walls and chimneys collapsed across the county. Residents said the tremor had lasted for about 10 to 15 seconds.
“I was lying in bed and it felt as if someone had just got up from bed next to me,” said Hendrick van Eck, 27, of Canterbury 8 about 60 miles southeast of London. “I then heard the sound of cracking, and it was getting heavier and heavier 9. It felt as if someone was at the end of my bed hopping up and down. ”
There are thousands of moderate quakes on this scale around the world each year, but they are rare inBritain. The April 28 quake was the strongest inBritainsince 2002 when a 4.8-magnitude quake struck the centralEnglandcity ofBirmingham 10.
The country’s strongest earthquake took place in theNorth Seain 1931, measuring 6.1 on the Richter scale 11. British Geologicisd Survey scientist Roger Musson said the quake took place on 28 April in an area that had seen several of the biggest earthquakes ever to strike Britain, including one in 1580 that caused damage in London and was felt in France. 12 Musson predicted that it was only a matter of time 13 before another earthquake struck this part ofEngland. However, people should not be scared too much by this prediction, Musson said, as the modern earthquake warning system ofBritainshould be able to detect a forthcoming quake and announce it several hours before it takes place. This would allow time for people to evacuate and reduce damage to the minimum.
词汇：
moderate /"mɔdərit/ adj．中等的
topple /"tɔpl/ v．倾倒，震倒
tremor /"tremə(r)/n．震动
fun-fair n．公共露天游乐场
forthcoming /fɔ:θ"kʌmiŋ/ adj．即将来临的
geological /dʒiə"lɔdʒikəl/ adj．地质的
magnitude /"mægnitju:d/ n．值，强度量
rouse /rauz/ v．唤醒
hop /hop/ v．齐足跳起
scale /skeil/ n．震级
evacuate /i"vækjueit/ v．疏散
注释：
1. power：电力
2. Kent County：肯特郡［位于英格兰东南部］
3. It felt as if the whole house was being slid across like a fun-fair ride．它（地震）给人的感觉是整幢房子就像游乐场的滑行机一样在滑动。ride是游乐场供人玩乐的乘坐式的活动装置。as if是“好像……一样；仿佛”，例如：He treated me as if I were his son．他待我如同对待他的儿子一样。
4. the 4.3-magnitude quake：里氏4.3级地震
5. English Channel：英吉利海峡
6. Dover：多佛尔［英格兰东南部港口城市］
7. Channel Tunnel：海峡隧道。Channel Tunnel（常简称为Chunnel）是连接英法两国的海峡隧道。
8. Canterbury：坎特伯雷［英格兰东南部城市，中世纪时曾是zōng jiāo 朝圣圣地］
9. it was getting heavier and heavier：爆裂声越来越响
10. Birmingham：伯明翰［英格兰中部城市］
11. the Richter scale：里氏震级表。美国地震学家Charles Francis Richter (1900-1985)于1935年制定了地震震级表。
12. British Geological Survey scientist Roger Musson said the quake took place on 28 April in an area that had seen several of the biggest earthquakes ever to strike Britain, including one in 1580 that caused damage in London and was felt in France．英国地质勘测所的科学家Roger Musson说，4月28日发生地震的地区曾经遭受过几起英国最大的地震，其中的一次发生在1580年，那次地震蹂躏了伦敦，并波及法国。
13. a matter of time：时间问题。又如：It"s not a matter of money．这个不是钱的问题。
The country"s strongest earthquake took place in Londonin 1580.
A:Right B:Wrong C:Not mentioned
有关系R和S，R∩S的运算等价于（）
A:S-（R-S） B:R-（R-S） C:（R-S）∪S D:R∪（R-S）
R1和R2电阻并联，等效电阻R是（）。
A:R1－R2 B:R1+R2 C:（R1+R2）/R1×R2 D:R1×R2/（R1+R2）
设A、B是两个同型矩阵，则r（A+B）与r（A）+r（B）的关系为（）。
A:r（A+>r+r B:r（A+=r+r C:无法比较 D:r（A+≤r+r
有关系R和S，R∩S的运算等价于______。
A:S-(R-S) B:R-(R-S) C:(R-S)∪S D:R∪(R-S)
设关系R1有r1个元组，关系R2有r2个元组，则关系R1和R2连接后的结果关系的元组数目是______个。
A:r1+r2 B:r1×r2 C:≤r1×r2 D:≥r1×r2
单项选择
