Light metals找一篇有关轻金属的英文文章

基础英语作业
1._______,metals are heavy.
A.In general
B.In a moment
C.In a hurry
D.In a corner
满分：5 分
2.He and his wife go to the cinema ________.
A.on occasions
B.on duty
C.on sale
D.on average
满分：5 分
3.The new reporters hurried to the airport,only _____ the film stars had left.
A.to be told
B.to tell
C.telling
D.told
满分：5 分
4.A number of paintings in the castle are believed ______ in a fire.
A.being destroyed
B.having been destroyed
C.to be destroyed
D.to have been destroyed
满分：5 分
5.It's important _________ the piano well.
A.of him to play
B.for him to play
C.of him playing
D.for him playing
满分：5 分
6.---_________ is the bike?---Just ＄150.
A.How much
B.How many
C.How long
D.How often
满分：5 分
7.___________ of the accident last year,he had to lie in bed for 3 months.
A.For a result
B.In a resul
C.With a result
D.As a result
满分：5 分
8.The problem _______ at tomorrow’s meeting is a very difficult one.
A.being discussed
B.discussed
C.to be discussed
D.to discuss
满分：5 分
9.He was too excited _________.
A.speak
B.not to speak
C.to speak
D.speaking
满分：5 分
10.We are not allowed ______ out doors with some other children.
A.playing
B.to be playing
C.to play
D.be playing
满分：5 分

There are various kinds of metals,each having its own properties
改为状语从句.!

【独立主格】【选择题】
41.Almost all metals are good conductors(导体),silver _______ the best conductor of all.
A.been B.being C.is D.to be
为什么选b

6.Metals ________when heated.A.extend B.spread C.expand D.widen 选C

as the shortage of certain metals approaches,others must be found to take their () a.place b.role c.shape

There are various kinds of metals,each ___D___ its own properties (特性).A.has B.had C.to have

Metals have many good properties,as has been stated before.
as has been stated before.
as怎么理解
为什么用完成时的被动 什么意义

一道英语题Gold is the very most valuable of all metals|
Gold is _____most valuable of all metals.
A.the much
B.the very
C.the far
D.far the
为什么?

30.There are 103 elements found in nature,____ are metals.
A most of which B most of them
C most of that D most which
选A?
为什么不选B？

朋友来看看，英语问题，Here is a table with the metals that react most at the top, and the metals that react least at the bottom.请问如何看出来是完全倒装？

12.Some metals are better conductors of electricity than others,______ means that the former have atoms containing more free electrons than latter.
A.that B.this C.which D.it
13.If the earth suddenly ______ spinning,we would all fly off it.
A.had stopped B.stopped
C.has stopped D.would stop
14.They hurried there only to find the meeting canceled.In fact,they ______ at all.
A.might not have gone B.needn't have gone
C.mustn't have gone D.wouldn't have gone
15.The time has come ______ we make extensive use of nuclear energy.
A.when B.while C.as D.since
16.You and I could hardly understand each other,_________?
A.could I B.couldn’t you
C.could we D.couldn’t we
17.You ______ a new bicycle,since the one you lost the other day has already been found.
A.should not buy B.need not buy
C.need not have bought D.should not have bought
18.They _______ in spite of the extremely difficult conditions.
A.carried out B.carried on C.carried off D.carried forward
19.Children who are over-protected by their parents may become _______.
A.hurt B.damaged C.spoiled D.harmed
20.When Mr.Jones gets old,he will _______ over his business to his son.
A.take B.hand C.think D.get
21.His understanding made a deep impression _______ the young girl.
A.in B.on C.for D.to
22.They have been trying to arrive at a practical solution _______ the problem.
A.in B.to C.on D.with
23.In many American families,parents feel that children should make important
decisions _______.
A.to themselves B.on themselves C.of themselves D.by themselves
24.I find this treatment very _______ to my health.
A.advisable B.invaluable C.beneficial D.worthy
25.As a _______ president,his views are treated with respect when he is interviewed.
A.prior B.previous C.late D.former
26.It is not difficult to _______ the idea that machines can communicate information to us.
A.admit B.receive C.accept D.convince

1._______,metals are heavy.
A.In general
B.In a moment
C.In a hurry
D.In a corner
满分：5 分
2.He and his wife go to the cinema ________.
A.on occasions
B.on duty
C.on sale
D.on average
满分：5 分
3.The new reporters hurried to the airport,only _____
the film stars had left.
A.to be told
B.to tell
C.telling
D.told
满分：5 分
4.A number of paintings in the castle are believed
______ in a fire.
A.being destroyed
B.having been
destroyed
C.to be destroyed
D.to have been
destroyed
满分：5 分
5.It's important _________ the piano well.
A.of him to play
B.for him to play
C.of him playing
D.for him playing
满分：5 分
6.---_________ is the bike?---Just ＄150.
A.How much
B.How many
C.How long
D.How often
满分：5 分
7.___________ of the accident last year,he had to lie
in bed for 3 months.
A.For a result
B.In a resul
C.With a result
D.As a result
满分：5 分
8.The problem _______ at tomorrow’s meeting is a very
difficult one.
A.being discussed
B.discussed
C.to be discussed
D.to discuss
满分：5 分
9.He was too excited _________.
A.speak
B.not to speak
C.to speak
D.speaking
满分：5 分
10.We are not allowed ______ out doors with some other
children.
A.playing
B.to be playing
C.to play
D.be playing

1.why metals are able to conduct heat and electricity?2.why the melting point of magnesium(649 c)i
1.elplain why metals are able to conduct heat and electricity?.
2.explain why the melting point of magnesium(649 c)is much higher than the melting point of sodium(97.9 c).
3.suggest reasons why plastics and ceramics are used to manufacture handles for metallic cooking utensils.

In factories ,workers use fire to m__ metals to things of different s__

19.Some metals are better conductors of electricity than others
,____ means that the former have atoms that contain more free electrons than the latterr.[A] that[B] this[C] it[D] which
题 20
20.It is highly desirable that a new president ____ for this college.[A] appointed[B] is appointed[C] be appointed[D] has been appointed

英语翻译
The reaction of metals with these substances can be put in order.Here is a table with the metals that react most at the top,and the metals that react least at the bottom.

那位大虾能帮帮忙 这个选什么呀 Iron is more useful ____ any other metals
那位大虾能帮帮忙 这个选什么呀
Iron is more useful_________any other metals:
A.as
B.than
C.then
D.so

some hard plastics can be ---------metals in manufacturing machine part.
A.substituted for B.take the place of
C Replaced in D given way to
请问每个选项的具体意思是什么,答案为什么选A

wastes from chemical surface treatment and coating of metals and other materials (for example
galvanic processes,zinc coating processes,pickling
processes,etching,phosphating,alkaline degreasing,anodising)怎么翻译

why some metals are better conductors of het then other
希望用英语回答这道题

英译汉几个句子
1.There are metals which possess the power to conduct electricity and the ability to be magnetized.
2.She arrived before I expected.
3.Chances favor the minds that are prepared.
4.The tall building has been practically leveled to the ground by the big fire.
5.The ancient battle field,which has become something holy,was almost untouched.
6.Its often the case that automobiles break down on the high way.
7.There have been many mass extinction through the history of the earth,the most famous of which is probably the extinction that finally saw the end of the dinosaurs regning on the earth 65 million years ago.

英语翻译
Metals are crystalline when in the solid state and,with few exceptions (e,g,.mercury),are solid at ambient temperatures.They are good conductors of heart and electricity and are opaque to light.They usually have a comparatively high density.Many metals are ductile — that is,their shape can be changed permanently by the application of a force without breaking.The forces required to cause this deformation and those required finally to break or fracture a metal are comparatively high,the fracture forces is not nearly as high as would be expected from simple considerations of the forces required to tear apart atoms of the metal.
The word automatic implies that there is a certain amount of sophistication in the control system.By automatic,it generally means that the system is usually capable of adapting to a variety of operating conditions and is able to respond to a class of inputs satisfactorily.However,not any type of control system has the automatic feature.Usually,the automatic feature is achieved by feeding the output variable back and comparing it with the command signal.When a system does not have the feedback structure,it is called an open-loop system,which is the simplest and most economical type of control system.Unfortunately,open-loop control system lack accuracy and versatility and can be used in none but the siplest types pf applications.
Comparisons were made in three categories:basic research,advanced development,and product implementation.Except for machine vision and software,Japanese basic research was comparable to the United States,with the Japanese closing in fast in machine vision system technology.Japanese artificial intelligence research is falling behind,primarily because the Japanese do not consider it an essential ingredient of their future systems.They appear capable of closing even that gap,if required.In the advanced development and product implementation areas,japan is equal to or better than the United States,and is continuing to pull ahead at this time.

英语高手请进,Sp-valent Metals
这个词语是怎么翻译?给个例句作为参考
Bond order potentials:a study of s- and sp-valent systems.

英语语法问题
Man has used metals for centuries in gradually increasing quantities.这里的man能否改成 the man,因为the加单数可以表示特指,也可以表示泛指

Reactivity of Metals （实验报告）
1Topic
Reactivity of Metals
2Goal
3Instructions
1Materials:
Na,Mg,Al,Ca,Cu,HCl(0.5M),distilled water
2Possible observations
If there is any reaction between metal and acid,metal and water
3Instructions
Mix metal with acid (and water) in test tube.If nothing happened,try to heat the test tube a bit.Record your observations in the following data table.
Metal HCL(0.5M) Water
Mg
Ca
Na
Al
Cu
4Safety
1The reaction could possibly generate lots of heat and hydrogen gas.Try to use only small amount of metal during the reaction!
2Hydrogen gas is flammable.Please keep your reaction container away from open flame.
3HCL is a strong acid.It could burn your skin and cloth.Goggle and lab coat are mandatory
4Requirement for lab report
1write a full report about this lab,including:
Introduction (purpose and hypothesis)
Materials (chemicals and apparatus)
Procedure
Result (data collection)
Conclusion and evaluation
2Print your report
3No less than800words

This kind of machine is used ____ metals.A.to cutting B.for cut C.for cutting D.cut

为什么不能用that?
Metals are used in industry in the form of alloy because the properties of alloys are much better than (((( that))) of pure metals.
为什么不能用((((that))))?
有没有好好看题目。that是不对的，我问为什么that是错的？

Metals are melted so that they can be made ihto different shapes
谁知道这句话怎么翻译~~~~~~~

英语翻译
Why does man use metals still so much today when there are materials,especially plastics,which are available?A material is generally use because it offers the required strength,and other properties,at minimum cost.Appearance is also an important factor.The main advantage of metals is their strength and toughness.Concrete may be cheaper and is often used in building,but even concrete depends on its core of steel for strength.

prices for goods such as precious metals and oil set records
此句中,set records
是再创新高吗?

During the summer,prices for goods such as precious metals and oil set records.Oil hit an all-time high of over one hundred forty-seven dollars a barrel on July eleventh.As a result,Americans started driving less.
此句中driving

There are many kinds of metals,____ its special properties.A.each having B.every having C.ea
请问each和every的区别

为什么金属可以导热
正在做化学题目（国外的）
要求我们画图解答
a) Metals conduct electricity
b) Metals conduct heat
c) Metals are ductile
d) Ionic substances shatter when hit
e) Ionic substances are hard but dissolve in water
f) ionic substance conduct electricity when dissolved in water
第一个做完了
下面几个求助