【C9】A.in whichB.with whichC.for whichD.of which
【C9】
A.in which
B.with which
C.for which
D.of which
【C9】
A.in which
B.with which
C.for which
D.of which
【C9】
A.in red
B.in rags
C.with colors
D.with uniform
The【C13】______similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat.【C14】______a closed container partially filled with a liquid is heated. The liquid expands, or【C15】______, becomes less dense; some of it evaporates.【C16】______, the vapor above the liquid surface becomes denser as the evaporated molecules are【C17】______it. The combination of temperature and pressure【C18】______the densities become equal is【C19】______the critical point. Above the critical point the liquid and the gas can no longer be【C20】______; there is a single, undifferentiated fluid phase of uniform. density.
【C1】
A.in
B.on
C.under
D.beyond
In many modern countries it has【C3】______been accepted that, by free education for all-whether rich or poor, clever or stupid-we can solve【C4】______of society and build a【C5】______nation. But we can already see that free education for all is not【C6】______: we find in such countries【C7】______people with university degrees than【C8】______jobs for them to do. Because of their degrees, they refuse to do what they think "low" work.
But we have only to think for a moment to understand that the work of a completely uneducated【C9】______is far more important than【C10】______we can live【C11】______education, but we【C12】______ if we have no food. If no one cleaned our streets and took the【C13】______away from our houses, we【C14】______terrible diseases in our towns.
In fact,【C15】______we say that all of us must be educated to fit us for life, it means that we must be educated【C16】______that each of us can do whatever job【C17】______him, and that we can realize that all jobs are【C18】______to society, and that it is very bad to be ashamed to do one's work, or to laugh at【C19】______. Only such a type of education can be【C20】______valuable to society.
【C1】
A.In order that
B.Before
C.As soon as
D.Though
Considered as a【C6】______of storing up buying power, money has good and bad points. It can more【C7】______be kept a long time【C8】______such things as food, which rots, or buildings, which slowly【C9】______to pieces, or machines, which rust. It takes up very little【C10】______, and if you put it in a bank, it is as【C11】______as anything in this world can be.
But modern money has some very【C12】______disadvantages as a means of storing up buying【C13】______. In the old days, when money was in the【C14】______of geld and silver coins, the metal in each was really【C15】______the amount stamped on the coin. But the paper in modem paper money and even the metal in most modem coins are worth less than the【C16】______written on them.【C17】______, the buying power of modem money can change very greatly【C18】______a short time.
It has happened more than once this century that the buying power of a country's money has fallen to almost【C19】______in a few weeks,【C20】______many thousands of people with savings.
【C1】
A.in mm
B.by chance
C.at all
D.on average
【C2】______of SAD【C3】______its effects during the short, dark days of【C4】______. The problems are most【C5】______in the months when there are fewer hours of daylight. When spring arrives, these signs【C6】______and SAD victims feel【C7】______again.
The National Mental Health Association reports that SAD can【C8】______anyone. The group says young people and women are【C9】______the highest risk for the disorder. It says that an estimated twenty-five percent of the American population suffers from some form. of SAD. About five percent suffer from a severe form. of the【C10】______.【C11】______, many people in other parts of the world also have the condition.
To treat the disorder, victims of SAD do not need to wait until【C12】______. Experts know that【C13】______affected individuals【C14】______bright light each day【C15】______the condition.【C16】______, there are other things people can do to ease the problem. They can【C17】______the sunlight in their homes and workplaces. They can spend【C18】______time outdoors in the fresh air during the day.
One study found that walking for an hour in winter sunlight was as【C19】______as spending two-and-one-half hours in【C20】______light indoors.
【C1】
A.in
B.from
C.at
D.with