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# Tektites, which may have been propelled to Earth from lunar

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Senior Manager
Joined: 25 Nov 2006
Posts: 333
Schools: St Gallen, Cambridge, HEC Montreal
Tektites, which may have been propelled to Earth from lunar [#permalink]

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27 Jan 2009, 04:28
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Tektites, which may have been propelled to Earth from lunar volcanoes, are much like the volcanic glass obsidian, but their chemical composition is different than any terrestrial lava; they contain far less water than obsidian does and none of its characteristic microcrystals.
(A) is different than any terrestrial lava; they contain
(B) is different than any terrestrial lava’s, containing
(C) is different from that of any terrestrial lava; they contain
(D) differs from any terrestrial lava in containing
(E) differs from that of any terrestrial lava’s, containing

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VP
Joined: 17 Jun 2008
Posts: 1477
Re: SC Question - 10 PT 55 [#permalink]

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27 Jan 2009, 04:52
C for correct usage of "different from" and also parallelism "Tektites are much like.....but ....chemical composition is different from....".
SVP
Joined: 07 Nov 2007
Posts: 1733
Location: New York
Re: SC Question - 10 PT 55 [#permalink]

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27 Jan 2009, 15:00
lumone wrote:
Tektites, which may have been propelled to Earth from lunar volcanoes, are much like the volcanic glass obsidian, but their chemical composition is different than any terrestrial lava; they contain far less water than obsidian does and none of its characteristic microcrystals.
(A) is different than any terrestrial lava; they contain
(B) is different than any terrestrial lava’s, containing
(C) is different from that of any terrestrial lava; they contain
(D) differs from any terrestrial lava in containing
(E) differs from that of any terrestrial lava’s, containing

differ from -- looks more idiomatic.

A,D,E
improper comparision
A,D - comparing "composition of Tektites" with "terrestrial lava"
E -- comparing "composition of Tektites" with " composition of terrestrial lava's"

Also B,D,E distorts the original meaning.
distorted meaning: terrestrial lava/lava's contains/containing far less water"
original setence .. "they" (Tektites) contain far less water"

C -- is the best and compares properly.

"composition of Tektites" with "that (composition) of terrestrial lava"
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Senior Manager
Joined: 25 Nov 2006
Posts: 333
Schools: St Gallen, Cambridge, HEC Montreal
Re: SC Question - 10 PT 55 [#permalink]

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28 Jan 2009, 05:57
OA is C

Thanks guys, I understand now.

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Re: SC Question - 10 PT 55   [#permalink] 28 Jan 2009, 05:57
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