1、【题目】The megaphone(microphone) makes the voice sound louder because it points sound waves in one direction and keeps them from spreading out in all directions.
选项：
A.slithering
B.radiating
C.interfering
D.murmuring
答案：
B
解析：
暂无解析
1、【题目】ThefirstimportantexpositionintheUnitedStateswasheldinPhiladelphiain1876.
选项：
A.exhibition
B.concert
C.excursion
D.contest
答案：
解析：
1、【题目】The Native American interpreter Sacajawea was a valuable member of the Lewis and dark expedition in 1805.
选项：
A.veryfriendly
B.veryuseful
C.verythoughtful.
D.verywealthy
答案：
B
解析：
暂无解析
1、【题目】Blue－green algae grow abundantly in salt marshes.
选项：
A.primarily
B.slowly
C.onplants(cultivate)
D.ingreatnumbers
答案：
D
解析：
暂无解析
1、【题目】Bats fly, rather than glide, and thus are the only mammals capable of true flight.
选项：
A.straight
B.safe
C.real
D.rapid
答案：
C
解析：
暂无解析
1、【题目】Blue－greenalgaegrowabundantlyinsaltmarshes.
选项：
A.primarily
B.slowly
C.onplants(cultivate)
D.ingreatnumbers
答案：
解析：
1、【题目】ThecompanyissuesanannualreporteveryMarch.
选项：
A.ayearly
B.acomprehensive
C.afinancial
D.aproduct
答案：
解析：
1、【题目】Eyespots, the most rudimentary eyes, are found in protozoan原生动物 flagellates 鞭毛虫 , flatworms 扁形虫 , and segmented worms片段 蠕虫 .
选项：
A.hostile-looking
B.perceptive
C.primitive
D.strangelyformed
答案：
C
解析：
暂无解析
1、【题目】Food must be moist in order to have a taste.
选项：
A.appetizing(delicious)
B.nutritious
C.damp
D.chewed
答案：
C
解析：
暂无解析
1、【题目】Although the Carbon 14 method of dating old objects is not foolproof , it is the best method available at present
选项：
A.whollyoperational
B.entirelyserviceable
C.fullyreliable
D.completelysafe
答案：
C
解析：
暂无解析
1、【题目】Oneofthegreatestbreakthroughsforprofessionalwomencamein1973whenthefieldofbankingopenedupforthem.
选项：
A.mostseriousdisappointments
B.mostsignificantadvances
C.mostabruptdeclines
D.mostcrucialsituations
答案：
解析：
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