Two families are planning to go on a canoe trip together. The families ' A, H: o0 o9 _0 m% e
consist of the following people:
4 c3 n: | J$ [. I4 }1 R# U Robert and Mary Henderson and their three sons, Tommy, Dan, and William; ( E$ p8 D# h. }* i( @" H0 \* v9 T
Jerome and Ellen Penick and their two daughters, Kate and Susan.
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There will be three canoes, with three people in each canoe. - U, H" Z( \. B* [
At least one of the four parents must be in each canoe. ) k2 \( k" _/ J9 n; j$ ?* J
At least one person from each family must be in each canoe.
7 B. a% G3 [! u# a0 ~, W4 zIf the two mothers ride together in the same canoe, and the three brothers
6 _" M/ p0 \, R- E- e" m9 }6 qeach ride in a different canoe, which of the following must be true?
$ Q. H$ k6 Q! W. f c Each canoe has both only male and females in. 8 D# _, b: ?3 f( N, }4 K( D# x
One of the canoes has only females in it.
! q, ~$ X! C- y" Y, q0 S! U One of the canoes has only males in it. ( U; }# Y' m1 N3 J7 J" C
The sisters ride in the same canoe. & ]: U; g& q+ h7 X3 F
The fathers ride in the same canoe. ; E3 \' G9 R% t6 R
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答案：(A)
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. N0 z/ c9 z1 Z d: Z: [If Ellen and Susan are together in one of the canoes, which of the following * m+ l2 n6 O7 X% T8 c$ V) o9 _# g
could be a list of the people together in another canoe? 4 `) d$ U0 ]0 `/ d$ G
Dan, Jerome, Kate 4 k7 T1 A, v+ \$ j; e2 I/ m
Dan, Jerome, William 7 ^% A+ _" P. \, P( i6 n
Dan, Kate, Tommy
0 t0 U& F7 u; M Jerome, Kate, Mary s, F, J, x3 x- d# f7 {
Mary, Robert, Tommy
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5 ]( p: b) r0 A9 F- ^2 N8 \$ D答案：(B) % k6 k2 Q+ w+ @1 N1 p0 S
2 z6 ]: v9 n9 _) {* ]If Jerome and Mary are together in one of the canoes, each of the following " N. j' s+ _1 e
could be a list of the people together in another canoe EXCEPT
2 D1 C6 ^7 Z9 i3 eDan, Ellen, Susan
* i( R$ K, l7 s1 \Ellen, Robert, Tommy
6 M& w% b! a* R8 EEllen, Susan, William
! B2 ?. u. g' k i1 ]" s, E8 QEllen, Tommy, Wiliam
/ o* G% G$ @8 D6 u# X$ k# w: ZKate, Robert, Susan
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9 P) H6 _" p& f, d' L3 E答案：(B)
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If each of the Henderson children rides in a different canoe, which of the 5 g* N: C' i# G: ~. E# e$ e
following must be true? / F9 V1 P( E0 e- G" K1 c
ⅠThe Penick children do not rode together.
; c) x3 F8 U- J" g, H n6 D ⅡThe Penick parents do not ride together. 6 @4 P2 a% p( r X
Ⅲ The Henderson parents do not ride together. . K$ G+ c2 ^9 _
Ⅰonly
( m2 D7 e% {( q; R; aⅡonly / \6 Z2 t+ M7 ]# I, A
ⅠandⅡonly
. K. |) ~& _9 j8 \) }% z' N$ @7 _ Ⅰand Ⅲ only / f$ L/ z4 q; D! `9 ~5 I
Ⅰ,Ⅱ, and Ⅲ
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% m' ~, f/ M2 ?$ Q) i' t3 ]* H$ V答案：(D) ! S! Y4 V; C4 L
I On one of the days of the trip, while the canoeists go over rapids, Jerome
0 h u* a1 n" c! ]chooses to go hiking with two of the children rather than canoeing, and there
M" o' r+ [5 F0 C( ~& Iare six people in the canoes, two in each canoe. If the other conditions still
9 S8 d+ K' u3 l. o0 Ghold for the canoeists, which of the following could be a list of the children
1 j0 s$ w, C8 W0 Oin the canoes? 9 w! y/ U& w8 n6 ?* K5 O! v
Dan, Kate, Susan
% l. z- H" [* p5 } R5 c# E Dan, Kate, William
# q* [/ t7 I* a! S) S1 M4 L( u Dan, Tommy, William
* W0 p& T8 p/ }8 @ Dan, William. Susan : W; _; d# y5 @7 c% m
Susan, Tommy, William 5 W# s: ~' h/ L1 o
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1 p% L1 R+ @' x, b0 J8 d答案：(A)
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M, N, O, P, Q, and R are perfectly straight one-way streets.
0 y1 x; ]7 E; S1 }& J0 v2 C0 `" V& ^Each street in this group is parallel to two of the other streets in the group, |
发表于 2012-8-15 12:45:20
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