34.Thc passage suggests that Douglas fir trees are （A）a type of alder' M3 {' d# d9 X' b" u: }/ @
（B）a type of evergreen
C1 c5 |7 O5 e8 Y/ X （C）similar to sword ferns
# J. v) V% i! N/ z4 ]3 t （D）fast-growing trees0 l0 e$ s) l: J9 O
35.It can be inferred from paragraph I that hemlock trees3 J! ?* _, @1 v5 ~" Q3 ?
（A） are similar in size to alder trees.
+ P6 U6 |" h" Q; L' N- `' u3 [ （B） interfere with the growth of Douglas fir trees
2 w4 u" C/ e8 c& p* V8 K a% t （C） reduce the number of alder trees In the forest& h9 \# W. U( p: J |4 X6 ]
（D） need less sunlight than do Douglas fir trees
# N. a& `. w4 k# S, H3 H1 ?2 Y 36.It can be inferred from paragraph 2 that previous generations of foresters6 e" |- H3 N _) R, B. l2 d" {
（A） did not study the effects of alders on forests
) \# Y! B V2 k7 |+ v; ^ （B） did not want alders In forests
# a- A( @( |- d; G0 `, p （C） harvested alders for lumber
" C& t1 ~8 D( N' ]. O2 `3 e （D） used alders to control the growth of evergreens, d5 B) w' Q$ B9 o+ |9 K3 ]. X
37.The word "they" in line 27 refers to
! b. T4 ]+ r7 ? （A） newly developing soils
4 ^4 A5 P4 n) _% x9 a1 ~ （B） alders' \$ f+ e+ \8 J4 l) z
（C） bags+ e% F4 V* L& Y
（D） chemical changes( l( f) _; U r& e/ C9 S' ~ X4 x
38.According to the passage that alders are used in mountainous areas to
" C2 ?; i+ L9 n. j' X （A） nitrogen: h$ c1 @# o$ n( S- c
（B） calcium& H0 m5 Z% w! C3 l# ]& p, z& x! w
（C） carbon2 R. U* r. b) V2 R: u' [1 y! h$ L
（D） oxygen |
发表于 2012-8-14 22:15:45
