Most people would describe water like a colorless liquid. They __1__
`( U% a. y& D- q: g/ m would know that in very cold conditions it becomes a solid called
9 v. _# x$ Y+ S/ b% @ ice and that when heating on a fire it becomes a vapor called steam. __2__
- ?8 d3 f. ~) A# y5 L6 O However, water, they would say, is a liquid. We have learned that* B) e( l8 k8 N: R
water consists of molecules composed with two atoms of hydrogen __3__; B( y4 J4 J. n! W
and one atom of oxygen, which we describe by the formula H2O.) S! e8 Z5 K8 q2 ~
This is equally true of the solid called ice and the gas called steam.# X9 V4 L$ ]! P" q5 J( t
Chemically there is no difference between the gas, the liquid, and
+ C3 |1 R% [# R5 O4 M( ?: a the solid, all of which is made up of molecules with the formula H2O. __4__
7 V8 G7 V5 y6 c) V5 V This is true of other chemical substances; most of them can exist as% `- R! b$ K" \ s
gases or as liquids or as solids. We may normally think of iron as a! T& j0 q- y; d+ y! {+ Q1 L* C
solid, but if we will heat it in a furnace, it will melt and become a __5__
( b& m7 b! q! z/ `( ^" d. T8 W liquid, and at very high temperatures it will become a gas. Nothing
& ?2 V1 a+ I7 @4 d6 S" u$ a very permanent occurs when a gas changes into a liquid or a solid.( y/ _- |4 t) e' {" M
Everyone knows that ice, which has been made by freezing water,
2 y/ Y( N j4 j# x# \ can be melted again by warmed and that steam can be condensed __6__
, |% t- k! s6 j! s/ |8 L! A" R5 p on a cold surface to become liquid water. In fact, it is only because
; Y8 H. L6 ^; w) k water is so a familiar substance that different names are used for __7__
" R2 a0 T3 b; Q% c% H$ L5 G the solid, liquid and gas. Most substances are only familiar with __8__* S6 ~; U& L' h
us in one state, because the temperatures requiring to turn them __9__
: U% L) B& ]+ E into gases are very high, or the temperatures necessary to turn them$ \* D# Z4 O# E7 M/ c& u5 T
into solids are so low. Water is an exception in this respect, which
( G6 z) G5 R4 z is another reason why its three states have given three different names. __10__' L, e8 H3 S6 r9 t) h) z: {
参考答案及解析:
6 f8 I+ i/ F4 ` c; ]2 k8 ?; y2 f 1. 改like为as9 Y4 Z9 Y; N" y0 h* I
describe sth as sth 是把……描述成……的意思。
4 g2 o9 F) ^8 ` 2. 改heating为heated
5 H6 o: m( X; ^' I 在时间,条件,让步等状语从句中,当从句主语和主句主语是一致的时候,可以将从句的主语和be的变化形式省略。5 B$ _2 J5 o( X" j9 V* |
3. 改with为of
1 d. h ]. K6 s be composed of 意思为“包括,由……组成”6 P6 d9 v- P/ ~8 R2 W: v
4. 改is made up 为 are made up" Q% v+ a9 F9 P& F* f9 D
which 指代上文中的 the gas, the liquid,and the solid,表示复数概念,所以要用are
" K1 a- f0 ^0 \9 ]1 y6 q3 L4 W 5. 将第一个will去掉6 ^$ N: W3 e+ _" _) b* m: X5 C
在时间条件状语从句和条件状语从句中要用现在时表示将来时。& Z! P+ u8 w$ T; z+ J
6. by改为when$ ^; P; k" J' i6 E5 l- o- o
when warm 相当于 when it is warmed( M0 p- \: ?7 x7 Z F0 Q
7. 改so为such
& ?. Z! V& f' N5 z 8. 改with为to
" u7 X3 v* m# k. h/ D: b 短语familiar to 后面才能接“某人” familiar with 是接sth
( H, k( e; i& ], E( H) W6 R 9. 改requiring为required; N; a# J6 _+ C5 I6 g! M9 {
过去分词短语作后置定语时,和被修饰的名词时逻辑动宾关系。
: N( c3 s2 l, G& c3 j 10. have 后加 been9 M3 [- U* t2 i
动词give和主语three states 是动宾关系 |