Word came from California of a new weapon in the war on household pests．
; W# \9 n7 Q0 T1 E9 e& JTwo scientists work for a firm in California developed 1．__________ 7 }- r3 H7 S. R6 [# P% s
a new method to eliminate insects with using dangerous chemicals．2．__________ ) j' I0 Z9 L4 t. P& E1 _8 }+ E& r
The new weapon—hot air．The basic idea is that ( J! j: T% J- }
insect pests can adjust to temperature much above normal．3．__________ " {4 I. f3 T/ w3 N7 L
In laboratory experiments，cockroaches and termites can’t survive
, j4 n$ I( y& |8 Z0 [much more than a quarter of hour at 100 degrees 4．__________
( U0 U/ B- R: F" V8 L( DFahrenheit or about fifty degrees centigrade． The new method involves
, i, K# a2 z6 O5 A3 O7 ecovering a house with a huge tent，and fill it with air heated to 5．__________
! S. J6 Y/ i$ Raround 65 degrees centigrade．: r. l, X8 @7 h8 @) Y8 `. e4 u
Hot air is forced in with fans and the tent keeps the heat inside the house．
$ E6 h& m/ L( Y0 _Although termites try to escape by hiding in wood beams，6．__________
0 Q8 H& c% b9 ]; zthe heat treatment must be continued by four to six hours． 7．__________
% S: {. A( X) e8 OBut when it's all over and the insects are dead，
4 @, D3 p, ?: P! ?7 X0 W7 A) ]there are no toxic residues to danger humans or pets，and no 8．__________ * m) i8 @4 o3 I7 C) Q# z7 H' N0 ?
funny smells．Scientists claim that there's no danger of fire too．9．_________* K$ J1 `7 f+ z2 y, P
Since very few household, materials will burn at 65 degrees centigrade. In fact, wood is prepared for construction use by drying
3 |5 c3 c& V8 M% @! a5 ~5 qin the ovens at 100 degrees centigrade, that is substantially hotter. 10._________
2 n- G* A" w1 s' \) e( H' d 参考答案：" z7 c" z3 S0 V2 ]
1. work → working
' b, [5 S! j; J' E' V9 j2. with → without / C7 I9 B' L' C1 V2 d D
3. can adjust → can not adjust % ~5 ~5 x' x" {- R/ g+ @
4. hour → an hour ( ]4 Q1 c, |/ y- f _! A
5. fill → filling
: z6 O: K7 C n: b0 i6. Although → Since
5 G5 `* P) k" V! r( r" ~) q; {7. by → for
/ m% s4 m: ]3 f2 y# V8. danger → endanger
9 m- F# {! P# `0 J4 W. f1 Z& J9. too → either; R1 k, ~7 G( R( @6 T
10. that → which |
发表于 2012-8-14 09:52:33
