2.In accordance with the passage,static electricity can be caused by___.</p> A.using home-made electrical goods.
" c/ E s7 S1 w B.wearing clothes made of natural materials.
* Z( K/ `+ ~. I6 v7 [) I C.walking on artificial floor coverings./ x& u2 n$ J# q( _5 w0 ?
D.copying TV programs on a computer.# [7 s! G: [+ w: d
3.A high negative ion count is likely to be found___.' {: Z5 X# e9 y1 s3 e- C
A.near a pound with a water pump.% d/ k7 r- A8 C, Z8 a
B.close to a slow-flowing river.
+ ]3 h( ~) G9 F7 z: x C.high in some barren mountains.+ D' h% B! |* R$ \$ J% i' K
D.by a rotating water sprinkler.2 q0 i( w& P" \ }- K R$ @
4.What kind of machine can generate negative ions indoors?
7 F9 I& R) k- C: {. h0 ` H( C A.Ionisers." g$ Z' Y8 y( @' [# L C0 E8 I
B.Air-conditioners.
( g3 {9 X- @/ {% F C.Exhaust-fans
0 D( v4 j8 q8 I D.Vacuum pumps.( f5 L8 C# |, }* n
5.Some scientists believe that___.$ b, n/ C+ n6 w2 C
A.watching animals to anticipate earthquakes is more effective than depending on seismography.
5 K/ {, K' j, i& n/ _ B.the unusual behavior of animals cannot be trusted.
* r. U3 |' w- s- H+ Q8 y C.neither watching nor using seismographs is reliable." S- Y) S+ }. I$ `7 c: d9 t) ]1 o& X* n
D.earthquake
! W% D/ W3 T, ?: w5 G 答案:BCDAA |