练习:
/ O. @6 J9 ^% L 1.Harry Potter is mentioned in the passage,because scientists
& }# |- r4 J: n7 W5 i- | Acan now make an invisible cloak of the same kind as he uses.
" x2 s& h: q& ]" j) x8 z- v; [ Btry to make an invisible cloak of the same kind as he uses. 0 k: B K( t! }9 `! m, G4 y/ \
Ctry to invent a device Similar in idea to the invisible cloak he uses.
% z+ k% Z7 g" Z" b Dknow that it is possible to make an invisible cloak of the same kind.
% q3 Q9 O' m; W) m( ? 2.What is true of microwaves? 8 x1 E7 e6 a! u4 _
ATheir wavelengths are shorter than those of visible light.
6 g% H2 ]% }4 p$ [ BTheir wavelengths are longer than those of visible light.
. Z1 c+ I0 Z' d( N! w CThey are different from visible light as they are a kind of radiant energy. 1 l& Z( I( C' y7 G7 F* U; T$ ?
DThey are visible to the human eye.
2 G6 w* S. t& B' [ 3.What is NOT true of the invisibility device? ' y& R' ?1 b; `% R+ f/ @" s, L
AIt is made of a special material with unusual ability. ( E( y5 q V5 R
BMicrowaves bounce off it when they strike it. 2 m- d& q7 U% u" \
CMicrowaves pass through it when they strike it. ' S; k( Q7 ^* ]" k
DIt bends the microwaves all the way around until they reach the opposite side.
+ N U- m g. ?, r( M 4.What does the word “coaster” mean in the passage? 外语学习网
! L- z2 N, S8 J- \ AA disk or plate placed under a drinking glass to protect a table top. 7 \% ~* u9 J, P# _) f% D
BA vessel engaged in coastal trade.
- t+ F/ O- O$ F* A CA roller coaster. / K6 |* q* U2 n- r
DA resident of a coastal area. - ?- \( E0 i* p4 V" }% l( N
5.Harry Potter’s invisibility cloak doesn’t have any real competition yet,because 5 U; V8 N# S& y: z& J& t
Ascientists have not found out how his cloak works.
" X1 h/ n6 X( Y4 p, l5 M Bthe cloaking device is a total failure. 外语学习网
9 L+ T" G5 n, {1 v* ? Cthe cloaking device works only for microwaves. % }8 c7 z! R: p- j. M$ j
Dthe cloaking device works only for visible light. |