历年GRE考试真题精选系列三十八

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For life to develop on another planet, two conditions, at least, are
necessary: (1) moderate temperature, as the result of suitable distance from a
. s$ G' A# l! o* s6 c0 ^7 |heat source, and (2) a range of temperature that is stable over a period of at
least 3.7 billion years. The unlikelihood that such conditions are often to be
( c# }, o1 o8 ~5 Bfound in the universe makes it highly probably that the exists only on Earth.
6 l/ ]- ?( J4 _# x' W) w　
The argument above assumes that
  
( T8 x# m4 j8 r a certain temperature range is the only condition essential to the
+ e& e& D) S: edevelopment of life on a planet
$ u8 V8 [, C+ R0 z3 g life cannot exist on planets other than Earth
forms of life on other planets would require some of the same conditions
1 ^3 S6 O% e: v/ O% L3 U$ kas do earthly forms of life
, ^; w, x6 k- c# {# T. c2 W there is no satisfactory explanation of why life development on Earth and
not on other planets
& e: u( \( H1 O signs of extinct life forms are likely to be found of many planets with
extreme temperatures
  
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答案：(C)
  
7 X: {2 [! w' d! O% S$ A& q! bⅠ. When a person dies, that person’s brain waves, as measured by the
/ r7 ~* v% ~" e, E　electroencephalograph (EEG), no longer show a positive reading but remain
　flat.
Ⅱ. A positive EEG reading can be obtained from a bowl of cherry gelatin.
  p7 U2 K9 g6 X　
' r7 R# r" G) u7 y' K$ R  nWhich of the following conclusions can most logically be drawn from the
3 k4 x1 G! w/ R1 m/ b1 k4 x$ Hinformation above?
0 A) L! g3 B+ C8 ~4 W6 T3 B  
2 _+ R0 I/ i- z' ?: P! ^ The EEG is not a reliable test to use in the measurement of human brain
/ u' T- T; p& |) i# x8 S; p1 gwaves.
Some changes in a person’s EEG can be viewed as a signal of death, but
life is not defined by a positive EEG.
6 S( n0 Z9 {! q3 u/ Q7 U1 I7 U8 z Whatever characteristics a human brain and a bowl of cherry gelatin have
. J* U2 Q! X9 c2 p& W8 G' s8 u+ o3 [in common are important factors in life and death.
If a person’s brain waves become flat, as measured by the EEG, that person
6 \3 ^' v$ N8 G+ ~7 V. Wis less alive than is a bowl of cherry gelatin.
: b. A% }& s- K) Z Whether a person’s EEG readings change or not is irrelevant in determining
4 p! Q. F  s% R( J# D, uwhether or not that person is alive.
  
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1 n; V) P/ E9 p答案：(B)
1 f6 e* ]7 q0 z( |3 h  
" o- ^6 U4 _& V2 lChild abuse could be eliminated if prospective parents were certain they
! A8 ]3 C! w; F' ewanted children before they had them.
　
1 v, ~# [" ]4 v2 DThe assertion above can be true only if which of the following is also true?
  
Prospective parents change their minds about wanting children once they
have them.
Those who love children do not abuse them.
Those who did not want to have their children often keep them.
Only those who do not love their children abuse children
Only those who were not sure they wanted to have their children abuse
children.
0 b6 w" {+ l6 o# ^. }  
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! ~8 V7 [/ M+ B5 u) O- b答案：(E)
  
! r; E) Z8 T+ Z) X+ ?+ z4 X: S　Every morning five commuters, M, N, O, P, and Q, go to one railroad station
and board a train that stops at exactly six subsequent stations, numbered 1-6;
the train stops first at station 1 and proceeds in Numerical order to station 6.
　
0 \9 V: C6 q  O7 [　　M always gets off either at station 1 or at station 2.
　　O always gets off one station before or one station after Q’s station.
* M8 o9 U" M7 q$ c7 G8 w　　P always gets off at station 3.
6 `/ d! ~6 k0 K+ p2 T0 y　　Q always gets off at station 4, 5, or 6.
　　No one reboards the morning train after getting off.
On a morning when no one gets off at stations 5 and 6, which of the following
) Y/ C3 R/ \4 ^( \  c' c# l( _must be true?
M gets off at station 2.
3 W, u  ^4 ]4 I" W# v: T) X9 U. x- U N gets off at station 2.
4 a$ U; A( g$ e- {7 v O gets off at station 4.
- f( e1 r3 U7 E5 d N and P get off at the same station.
7 I4 H0 H. d' m/ `( u. c O and P get off at the same station.
$ w9 E) ^+ _- ~# y" v2 f  t3 U, U3 ]  
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# ~9 g2 z+ s. S; Z6 b3 x答案：(E)
  
5 s0 S7 m0 C" aOn a morning when Q gets off at station 4. and no more than two of the
commuters get off at any one station, which of the following must be true?
If N gets off at station 2, M gets off at station 1.
* {: W7 w# e0 N- \5 ]$ ]. k If N gets off at station 3, O gets off at station 5.
8 _: n9 b! |( E! {3 X) m If N gets off at station 4, O gets off at station 5.
If O gets off at station 3, N gets off at station 2.
5 b5 s1 V) y* c If O gets off at station 3, N gets off at station 5.
4 A) n3 \/ u2 M8 i  
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答案：(B)