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1.Penicillin acts both_____.
a.killing bacteria and their growth being inhibited
b.and to kill bacteria and to inhibit their growth
c.by killing bacteria and by inhibiting their growth
d.kills bacteria and inhibits their growth
答对率：44%
key:c

2.Not until the 1550's ____ in New York seek to rescue historic building from destruction or alteration.
a.some concerned citizens
b.did some concerned citizens
c.some citizens concerned
d.when some citizens concerned
答对率：44%
key:b

3.Proteins are [made up of] long,[folded irregularly] chains,[the links] of [which are] amino acids.
答对率：45%
key:b

4.Although most species of small birds gather in groups [at] feeders provided by bird-wacthers,the bright red [cardinals] usually appears alone [or] with [its] mate.
答对率：36%
key:b

5.[The astronomy] is the oldest [science],but it [continues] to be [at] the forefront of scientific thought.
答对率：34%
key:d

6.Henry David Thoreau was [an] America writer who [is] rembered [for] his faith in the religious significance of [the nayure].
答对率：23%
key:d

7.Gold or [silver] bullion serve [into] commerce as mediums of exchange [all] over [the world].
答对率：30%
key:b

9.Relative humidity is the amount of water vapor the air contains at a certain temperature ____ with the amount it could hold at that temperature.
a.to compare
b.compared
c.comparing
d.compares
答对率：49%
key:b

10.Scientist believe the first inhabitants of the Americas arrived by crossing the land bridge the cinnected Siberia and ____ more than 10,000 years ago.
a.this is Alaska now
b.Alaska is now
c.is now Alaska
d.what is now Alaska
答对率：42%
key:d

11.fibers of hair and wool are not continuous and must normally be spun into thread ____ woven into textile fabriccs.
a.as are they
b.when to be
c.that they are
d.if they are to be
答对率：41%
key:d

12.Sleep is [controlled] by [the brain] and [associated by] characteristic [breathing] rhythms.
答对率：45%
key:c

13.The walls [around] the city of Quebec,which was originally a [fort military],still [stand],making Quebec [the only] walled city in North America.
答对率：45%
key:b

14.The manufacture of [automobile] was [extremely] expensive [until] assembly-line techniques [made] them cheaper to produce.
答对率：40%
key:a

15.The balled [is characterized] by informal diction,by a narrative largely [dependent on] action,by thematic [intense],and by [stress] on repetition.
答对率：26%
key:c

16.Outside the bright primary rainbow,____ much fainter secondary may be visible.
a.so
b.a
c.since
d.still
答对率：43%
key:b

17.Indigo is a vat color,____ called because it dose not dissolvve in water.
a.which it
b.it is
c.but
d.so
答对率：40%
key:b

18.Today,mordern texile mills can manufacture in [a few] seconds as it once took [workers] weeks [to produce] by hand.
答对率：42%
key:a

19.America painter Georgia O'Keeffe is well known [as] her large paintings of flowers [in which] single [blossoms] are [presented] as if in close-up.
答对率：50%
key:a

20.[Despite] television is the dominant entertainment medium for United States households,Garrison Keillor's Saturday night [radio show] of folk songs and stories [is] heard by [millions] of people.
答对率：45%
key:a

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