第6部分:完形填空(第51~65题,每题1分,共1 5分)
( c0 `0 P% I7 O% E' `7 v 阅读下面的短文,文中有15处空白,每处空白给出了4个选项,请根据短文的内容从4个选项中选择1个最佳答案,涂在答题卡相应的位置上。" x" |: S4 `9 A0 F4 s$ |
Dark Forces Dominate Universe$ |6 A* B" s. X9 Z4 {
The earth.moon.sun and all visible stars in the sky make up less than one percent of the
- m% J& e6 m/ E: l r universe.Almost all the rest is dark matter and dark energy,unknown forces that (51)
% d5 v. Z; |" L6 [4 r* O( `0 U$ {. S astronomers.; c7 ?% a; c6 V: y! [( U; @
Observations in recent years have changed the basic(52)of how the universe# {0 x* P. W8 [8 P
evolved and have indicated how little is known about the major forces and substances that
* `5 q6 G- F3 T- c- c, m6 l (53) our world
4 G; |; x$ W' J8 e( V! c Astronomers now know that luminous(发光的)matter—stars,planets and hot gas----
7 A4 `3 O& o5 a Accounts (54) only about 0,4 percent of the universe.Non-luminous components,such as black holes and intergalactic(星系间的)gas, (55)up 3.6 percent The rest is either dark matter , about 23 percent,or dark energy,about 73 percent.
7 E: [* p5 M( V* y+ | Dark matter.Sometimes (56)“cold dark matter,”has been known for some time.Only recently have researchers come to understand the key role it (57)formation of stars,planets and even people.* Y- O( r3 Q" Y! \6 H
We (58) our very existence to dark matter,” said physicist Paul Steinhardt
$ Z5 k* B0 @! ? Q and a co-author of a review on dark matter which (59)not long ago in the journal
; I# C* A. i" m1 n9 B7 J Science.
$ n: }# z6 K. d$ }1 o “Dark matter dominated the structure (60)in the early universe,”Steinhardt) o& Q! b4 A2 M. E: v
said.’'For the first few billion years dark matter contained most of the mass of the universe You
/ \# z" P! k' j* v; E can think of ordinary matter (61) a froth(泡沫)of an ocean of dark matter.The dark
! T1 T, r7 X0 M- `0 {( V matter dumps(结成块)and the ordinary matter falls into it.That (62) to the formation of the stars and galaxies(星系).”
0 e H3 V' x$ ]% `& r Without dark matter ,“ there would be virtually no structures in the universe9 O. h R4 j. ] c, f
The nature of dark matter is (63)It cannot be seen or detected directly
3 `" m2 Q9 D2 T$ o7 M Astronomers know it is there because of its (64)on celestial(天体的)objects that can be seen and measured.
) \" W* e F1 l6 D; N( q But the most dominating force of all in the universe is called dark energy, a recently
$ a% G5 w% \& w1 L# C9 w8 {' b8 X (65)power that astronomers say is causing the galaxies in the universe to separate at a faster and faster speed.
; z! N4 r9 E. O$ e$ }' C# q' \ 51 A worry B move C puzzle D reject
( T7 R1 |& k4 Z N$ _ 52 A understanding B value C pattern D structure
! t# o/ G: N) E P 53 A changed B described C designed D shaped
! s9 H$ N5 k! i' }. H J 54 A in B for C of D to- w( s$ X/ U4 k) u9 H9 J; h9 H
55 A make B keep C set D get
- a( t8 W' P9 l# i 56 A written B called C identified D seen# g+ Y8 `/ V j8 \7 F9 D
57 A signed B stressed C acted D played
# G4 Y, y8 o0 K8 r1 p( s; h" o 58 A believe B owe C feel D regard
5 D- }% ^2 ]) [$ `2 r1 f8 D- u7 Q0 U 59 A appeared B carried C published D contributed* A5 m2 g. q# e# B
60 A element B shape C formation D power
& }0 K" E5 j7 f" ~& z% A 61 A with B as C form D beside
- l: B* Q. b' t: w/ s' T 62A turned B worked C led D attempted
+ ^. d8 s2 ?4 ^6 X% @* M; g 63 A unknow B interesting C different D visible
9 ~; o3 t4 a5 Q7 p ] 64 A form B outcome C effect D source
9 s# a! z5 ~0 Y( S; l 65 A seized B proven C caught D grasped |