Among the five Great Lakes, only （）is wholly within the United States.A、ErieB、SuperiorC、Michigan

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Influenza（流感）

Influenza has been with us a long time.According to some Greek writers_________(51)medical history,
the outbreak of 412 B.C.was of influenza. The same has been suggested of the sickness_________(52)swept
through the Greek army attacking Syracuse in 395 B.C.Influenza is a disease that moves most quickly among
people living in_________(53)conditions,hence,it is likely to attack armies.
__________(54)the nineteenth century there were five widespread outbreaks of influenza. The last of the
five________（55)in 1889 and marked the beginning of the story of influenza in our time.________(56)
the recent outbreak,it started in Asia.
For more than forty years before that outbreak,influenza had steadily_______(57)and was believed
to be dying out.A new group of outbreaks was_________(58)by the great outbreak of 1889-1890 and for the
next quarter of a century influenza remained a constant threat.
In April 1918 influenza broke out among American troops stationed in France.It quickly spread through
all the___________(59)but caused relatively few deaths.Four months later,however,a second outbreak started
which__________(60)to be a killer. It killed not only the old and already sick but also healthy young adults.
It________(61)through every country in the world,only a few distant islands in the South Atlantic and the
Pacific remaining_________(62).It brought the life of whole countries to stop,food_________(63)stopped
and work loss was very great.Before the great outbreak ended,it had killed at_______(64)15 million
people.Thereafter,there have been several great outbreaks throughout the world.It is thus__________(65)
that influenza is a terrible infection that we have to pay more attention to.

_________(51)
A:on
B:by
C:to
D:with

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第一篇

California一A Land of Variety and Contrast

California is a land of variety and contrast. Almost every type of physical land feature,sort of arctic ice fields and tropical jungles can be found within its borders.Sharply contrasting types of land often lie very close to one another. People living in Bakersfield,for instance,can visit the Pacific Ocean and the coastal plain,the fertile San Joaquin Valley,the arid Mojave Desert,and the high Sierra Nevada,all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day,without having to travel long distance.
Contrast abounds in California. The highest point in the United States(outside Alaska)is in California,and so is the lowest point(including Alaska).Mount Whitney,14,494 feet above sea level,is separated from Death Valley,282 feet below sea level,by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles.
California has deep,clear mountain lakes like Lake Tahoe,the deepest in the country,but it also has shallow,salty desert lakes.It has Lake Tulainyo,12,020 feet above sea level,and the lowest lake in the country,the Salton Sea,236 feet below sea level. Some of its lakes,like Owens Lake in Death Valley,are not lakes at all:they are dried up lake beds.
In addition to mountains,lakes,valleys,deserts,and plateaus,California has its Pacific coastline,stretching longer than the coastlines of Oregon and Washington combined.

Where is the highest point in the United States located?
A:Lake Tahoe.
B:Sierra Nevada.
C:Mount Whitney.
D:Alaska.

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第一篇

California一A Land of Variety and Contrast

California is a land of variety and contrast. Almost every type of physical land feature,sort of arctic ice fields and tropical jungles can be found within its borders.Sharply contrasting types of land often lie very close to one another. People living in Bakersfield,for instance,can visit the Pacific Ocean and the coastal plain,the fertile San Joaquin Valley,the arid Mojave Desert,and the high Sierra Nevada,all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day,without having to travel long distance.
Contrast abounds in California. The highest point in the United States(outside Alaska)is in California,and so is the lowest point(including Alaska).Mount Whitney,14,494 feet above sea level,is separated from Death Valley,282 feet below sea level,by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles.
California has deep,clear mountain lakes like Lake Tahoe,the deepest in the country,but it also has shallow,salty desert lakes.It has Lake Tulainyo,12,020 feet above sea level,and the lowest lake in the country,the Salton Sea,236 feet below sea level. Some of its lakes,like Owens Lake in Death Valley,are not lakes at all:they are dried up lake beds.
In addition to mountains,lakes,valleys,deserts,and plateaus,California has its Pacific coastline,stretching longer than the coastlines of Oregon and Washington combined.

How far away is Death Valley from Mount Whitney?
A:About 3 miles.
B:Only 100 miles.
C:282 feet.
D:14,494 feet.

共用题干
第一篇

California一A Land of Variety and Contrast

California is a land of variety and contrast. Almost every type of physical land feature,sort of arctic ice fields and tropical jungles can be found within its borders.Sharply contrasting types of land often lie very close to one another. People living in Bakersfield,for instance,can visit the Pacific Ocean and the coastal plain,the fertile San Joaquin Valley,the arid Mojave Desert,and the high Sierra Nevada,all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day,without having to travel long distance.
Contrast abounds in California. The highest point in the United States(outside Alaska)is in California,and so is the lowest point(including Alaska).Mount Whitney,14,494 feet above sea level,is separated from Death Valley,282 feet below sea level,by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles.
California has deep,clear mountain lakes like Lake Tahoe,the deepest in the country,but it also has shallow,salty desert lakes.It has Lake Tulainyo,12,020 feet above sea level,and the lowest lake in the country,the Salton Sea,236 feet below sea level. Some of its lakes,like Owens Lake in Death Valley,are not lakes at all:they are dried up lake beds.
In addition to mountains,lakes,valleys,deserts,and plateaus,California has its Pacific coastline,stretching longer than the coastlines of Oregon and Washington combined.

Which of the following is NOT mentioned in the passage as being within a radius of about 100 miles of Bakersfield?
A:The Pacific Ocean.
B:San Joaquin Valley.
C:Mojave Desert.
D:Oregon and Washington.

共用题干
第一篇

California一A Land of Variety and Contrast

California is a land of variety and contrast. Almost every type of physical land feature,sort of arctic ice fields and tropical jungles can be found within its borders.Sharply contrasting types of land often lie very close to one another. People living in Bakersfield,for instance,can visit the Pacific Ocean and the coastal plain,the fertile San Joaquin Valley,the arid Mojave Desert,and the high Sierra Nevada,all within a radius of about 100 miles. In other areas it is possible to go snow skiing in the morning and surfing in the evening of the same day,without having to travel long distance.
Contrast abounds in California. The highest point in the United States(outside Alaska)is in California,and so is the lowest point(including Alaska).Mount Whitney,14,494 feet above sea level,is separated from Death Valley,282 feet below sea level,by a distance of only 100 miles. The two areas have a difference in altitude of almost three miles.
California has deep,clear mountain lakes like Lake Tahoe,the deepest in the country,but it also has shallow,salty desert lakes.It has Lake Tulainyo,12,020 feet above sea level,and the lowest lake in the country,the Salton Sea,236 feet below sea level. Some of its lakes,like Owens Lake in Death Valley,are not lakes at all:they are dried up lake beds.
In addition to mountains,lakes,valleys,deserts,and plateaus,California has its Pacific coastline,stretching longer than the coastlines of Oregon and Washington combined.

Which of、 the following is the lowest point in the United States?
A:Lake Tulainyo.
B:Mojave desert.
C:Death Valley.
D:The Salton Sea.

When the glaciers（ ）after the last ice age,the five Great Lakes of North America were formed.

A.advanced
B.evaporated
C.thawed
D.exploded