B
Below is a table which shows the melting(液化)and boiling points of common substances.Study the table.Then do Numbers 4—7.
|
Substance |
Melting point(C) |
Boiling Point(C) |
|
Water Alcohol Nitrogen Oxygen |
0 –117 –210 -218 |
100 78 –196 –183 |
4.The underlined word‘substances'means‘a type of'_________.
A.matter B.liquid C.solid D.gas
5.Which of the four should be a liquid at-90 degrees?
A.water B.alcohol C.nitrogen D.oxygen
6.Mixing alcohol and water is often used to wash windscreens of cars during the wintertime because _________.
A.it is easier for alcohol to change into gas
B.alcohol is not easily separated from water
C.alcohol freezes at lower temperature than water
D.the mixture is not expensive
7.In order to change water from a solid to a liquid energy must be _________.
A.removed B.added C.created D.destroyed
六、Reading comprehension.(阅读理解)20分
A
Air is an odorless(that cannot be smelled;smelless),invisible(that cannot be seen)gas that surrounds the planet earth.It is everywhere on the planet.An “empty” drinking glass and an “empty” room,to give two examples,are not really empty.Each is filled with air.When the glass is filled with water,the water pushes the air out of the glass.
Air,as a gas,has no definite(fixed,particular)shape,but,because it is matter,it takes up space.It is easy to prove that air is something that takes up space.Stuff a dry handkerchief into the bottom of a glass so that it will not fall out when the glass is turned upside-down.Push the upside-down glass,hold it straight into a jar of water till the glass is completely covered.When the glass is taken out of water,the handkerchief will be dry.The air inside the glass took up space and kept the water from coming in.
1.“Stuff a dry handkerchief into…”.The underlined word means.
A.Press tightly B.Take out C.Put down D.Turn fully
2.The writer tells us that _________.
A.the experiment was done in the laboratory
B.the experiment was done outside the room
C.the experiment is easily done
D.the experiment is carried out indoors
3.Which of the following pictures gives us the correct result?
(W—water;A—air;H—handkerchief)
五、Cloze test(完形填空)20分
In the last century there were not 1 big towns in the U.S. 2 there are today.Most towns in the country were small.And in these small towns,the general store was 3 people 4 the things they couldn't made or grow at home.
5 the store sold 6 a good deal about life in the United States at that time.People bought tools that they needed on their farms.They bought salt,sugar,coffee and 7 that their farms didn't produce.They bought articles of 8 that they could not make themselves,and cloth or other materials that the 9 would make into dresses for themselves,shirts for the men and clothes for their children.
Life in the 10 century America was 11 .One proves that most people were satisfied with what they had 12 still they looked forward 13 courage to whatever the future would 14 them.It would be interesting to know 15 they would feel about life in the world today. 16 to them that life is too complex,or would they be glad to see that life is 17 in the past?
Nobody will 18 know the 19 people at that time would enjoy life today or not.Perhaps man is always the same of his kind.They did take things for granted,and also they did try to make life more comfortable.We have to admit that it is the same 20 people at present.
1.A.many B.so many C.so much D.a lot of
2.A.where B.like C.what D.as
3.A.where B.for C.in which D.that
4.A.made B.bought C.sold D.paid for
5.A.That B.No matter C.Which D.What
6.A.says B.talks C.refers D.tells
7.A.other things B.another food C.other foods D.foods and drinks
8.A.clothes B.clothing C.dresses D.suits
9.A.farmers B.men C.women D.children
10.A.eighteenth B.nineteenth C.twentieth D.next
11.A.easy B.simple C.interesting D.tiresome
12.A.and which B.and yet C.and that D.but what
13.A.in B.to C.of D.with
14.A.bring B.take C.happen to D.serve
15.A.what B.whether C.that D.how
16.A.Did it appear B.Would it seem C.What did it seem D.What appeared
17.A.still what it used to be B.better than what it was
C.much more easier than D.no more than it was
18.A.never B.always C.once D.ever
19.A.truth that B.fact whether C.idea how D.information of
20.A.as B.for C.with D.like
—Do you think we can get there on time?
—Yes,_________ the bus does not break down.
A.even if B.unless
C.until D.so long as
_________,they'll carry on the work until they can get the money they need.
A.As I think B.In my opinion
C.In spite of D.To my view
Every minute should be _________ lessons.
A.made full use to learn
B.made use of learning
C.made use of to learn
D.used of learning
