新概念英语第四册选择题答案,新概念英语第四册选择题：Exploringthesea-floor
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【#新概念英语# 导语】新概念英语一共144课。整本书无论是语法还是词汇，题材还是语句，都有其出彩之处。正是因为如此，新概念英语更是经久不衰，深受广大英语学习者的喜爱。®文档大全网为您整理了“Exploring the sea-floor”，希望可以帮助到您！
Multiple choice questions 多项选择题
Choose the correct answers to the following questions.
Comprehension 理解
1，A hundred years ago, probably no one thought the deep ocean floor was ____.
a.two dimensional
b.a hazard for navigation
c.irregular
d.flat
2，The H.M.S. Challenger expedition ____.
a.gave the study of the ocean floor scientific respectability
b.took a sounding of over 2,400 fathoms
c.was devoted to dredging the ocean
d.was devoted to laying submarine cables
3，Continents and islands are standing on ____.
a.the topography of the sea bed
b.the earth's crust
c.the greater part of the earth's surface
d.superimposed features of the continents
4，The continental slope ____.
a.starts immediately at the seashore
b.consists entirely of steep, probably vertical cliffs
c.ends at the 100-fathom mark
d.gradually stretches out to the sea bed
Structure 句型
1，It was only____1869 that H.M.S. Porcupine obtained soundings. (11.5-6)
a.on
b.at
c.until
d.in
2，The sea floor became a subject ____studying.
a.worthy
b.worth
c.is worth
d.worths
3，Submarine cables were ____across the Atlantic. (1.9)
a.lying
b.lain
c.laid
d.lied
4，It is ____to regard the sea-floor as the earth's crust. (1.14)
a.less reasonable
b.enough reasonable
c.reasonable enough
d.so reasonable
Vocabulary 词汇
1，The Royal Society was allowed the ____of the H.M.S. Porcupine. (11.5-6)
a.use
b.loan
c.rental
d.exploration
2，A burst of activity ____with the laying of submarine cables … (1.9)
a.coupled
b.communicated
c.connected
d.reckoned
3，——together with the islands and other ____of the oceans. (1.15)
a.studies
b.observations
c.characters
d.characteristics
4，——after being ____from the continental masses. (11.23-24)
a.worn down
b.worn through
c.worn away
d.worn out
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