381. The simple of these is the carbon dioxide from the respiration of an ant cluster, a chemical that acts pheromone to promote aggregation.
! e3 u" M* Z$ c, |' zThe word "cluster" is closest in meaning to which of following?; Q4 Q; q7 R, F# L# A) o0 {/ |: V
(A) organ4 Q4 F0 E$ K0 U# r. B) {) }
(B) activity+ ?1 ?3 o7 l& l; N4 ~! t
(C) group
) ]& K" }7 R5 F- b: C3 ^(D) cycle! N1 z A! p; ]" H
' S- _' c( @) K9 z, |6 W
382. Fire ants also make use of an alarm pheromone to alert workers to an emergency, and their scouts lay down a trail pheromone as a guide during mass migrations.
& ~6 b6 ]4 Q5 g6 OThe word "alert" is closest in meaning to which of following?
6 r* j8 B8 q$ V; w d; \) `) R. n K(A) allow, P( c2 l3 p' h& p+ z" z. c
(B) transport6 u6 e" L' G0 Y2 K9 A/ s: I- b
(C) warn
/ ?' J6 J, J/ C/ J; ?6 Q(D) provide" ?3 a# g7 R3 [
) n( \7 |, [* F3 L383. A fire ant queen emits a chemical signal that identifies her to the colony's workers. They respond by scurrying to gather around her. The decomposing corpse of a dead ant also generates a signal, to which workers respond by eliminating the corpse from the nest.
9 Q' M2 |+ u5 c: y3 l+ k( d: ZThe word "scurrying" is closest in meaning to which of following?
7 J; v. L4 z4 @% k$ D+ i(A) agreeing) a5 x, x6 R7 v1 N' h
(B) appearing8 E1 X) W$ V& v* c. L0 e
(C) competing$ m$ Q: ~2 h1 e! [
(D) rushing4 N9 P( I4 i# V6 I1 q/ ? e
+ W- @& |# X" \
384. Rivers also reveal clay along their banks, and erosion on a hillside may make clay easily accessible." G6 U1 ]' M$ k6 z8 c1 X) B
The word "accessible" is closest in meaning to which of following?
/ R) H$ M; l; t# t) \8 h3 [(A) buried
+ K1 y! {1 W5 c( K8 |5 s# _(B) improved
( X2 G5 }9 k8 z/ W( d5 Q( f9 K" V(C) available+ d6 ]$ |9 o% p) e* l0 @
(D) workable
, M9 s* C" t0 K- Q F
/ u4 t2 v8 Q% x5 j3 X3 @# a385. Variations of clay composition and the temperatures at which they are fired account for the differences in texture and appearance between a china teacup and an earthenware flowerpot.3 e3 I" S- j0 u4 w$ Q" H# M7 f
The phrase "account for" is closest in meaning to which of following?
+ m; M* \# L" W5 z(A) reduce
: N0 O" D7 L/ y4 g, u' P# p(B) explain
5 w. k( S, H6 Y(C) combine with
, [; i3 {: s4 ?! j& I$ [(D) list all of2 W3 p( }! d2 W9 D* d) T7 w
7 K, u" w7 M H( z
381 C
' r/ n- I$ S9 [% o6 M382 C+ r- r5 s( o& @
383 D* ^) G5 b; ~. }$ K1 h) r
384 C5 U0 W s1 Y0 Y% i
385 B |
发表于 2012-8-14 22:41:43
