-People use mobile phones-Yes. They are very important in our life.
A. everyday; everyday
B. everyday;every day
C. every day;everyday
D. every day;every day
A. everyday; everyday
B. everyday;every day
C. every day;everyday
D. every day;every day
第1题
In essence, a nation 【C16】______ its resources and needs does not differ from the 【C17】______ weekly shopping or monthly household budget. 【C18】______ are designed to ensure an 【C19】______ supply of essentials, at a rate of spending 【C20】______ the limits of income.
【C1】
A.impression
B.sorrow
C.emotion
D.pleasure
第2题
A.they are very dangerous
B.they are respected by Indians
C.they may spread disease
D.they help kill rats
第3题
A.They are very kind.
B.They are very easygoing.
C.They often speak more than one language.
D.They always eat pastas.
第4题
They're diamonds!
For hundreds of years men have risked their lives searching for diamonds. To many the discovery of this glittering treasure has seemed more important than the discovery of new lands. Fairy stories tell of brave knights who battled fierce dragons and evil wizards to win kingdom rich with diamonds. In the Tower of Lon- don in England, there is a very special room protected by guards. There, inside a thick glass ease, are jeweled crowns once worn by kings and queens. People from all over the world come to see the shimmering diamonds and other precious stones that shine from behind the glass.
Most diamonds seem to flash with a kind of white fire. But there are diamonds that sparkle in other colors, too. Sometimes diamonds are discovered in gravel at the bottom of rivers and streams. (To get these diamonds, the gravel is sucked up through giant hoses that act like vacuum cleaners.) Diamonds are found in rivers, on land, and in great stretches of hot desert sand. A few small ones are even found or near meteorites that strike the ground from outer space.
But most diamonds are found in rocks deep inside the diamond mines of Africa. The diamonds were made millions and millions of years ago when flaming volcanoes melted a mineral called carbon which was a part of these rocks. Gigantic earthquakes shook the rock and pressed them tightly, together. The hot melted carbon in the rock squeezed at the same time--squee2ed so tightly that by the time it cooled, it had changed into the lovely hard gems called diamonds,
To get at these valuable diamond rocks, workers ride in an elevator that goes down and down into the blackness far below the ground. Tunnels connect this deep shaft with the openings--called pipes--inside the ancient volcanoes.
When they are first dug from the mines, diamonds don't glitter or sparkle as they do when we see them in tings or other jewelry. They look more like dull bits of glass. A man who knows all about diamonds--a diamond cutter--must cut them just right. Diamonds are so hard that nothing can cut them except the edge of another diamond.
Using his diamond-edged tools, the diamond cutter carefully removes tiny pieces so that the diamond will have many sharp edges and smooth surfaces--like little windows. It is because of these shaft edges and smooth surfaces that the diamond reflects light, sparkles and flashes with tiny bursts of color, and seems almost ablaze with fire. Diamond cutters often use diamond saws. The fine powder--diamond dust--that is left after the sawing is done can be used in a kind of sandpaper to polish the sparking gems.
Not all diamonds are clear enough or pretty enough or large enough to be made into jewelry. But because they are so hard, they can be used for other things, such as points for drills and needles for record player. These diamonds are called industrial diamonds. Some of them are man made. Carbon is heated until it is hot and then squeezed. If men ever learn how to make it hot enough and to squeeze it tightly enough, they will probably be able to make big diamonds. Then maybe diamonds will be cheap enough to use as buttons on your shirt or coat! (610)
The following are the characters of diamonds EXCEPT ______.
A.they sparkle and glitter in the light
B.they are very hard
C.they are very valuable
D.they are tiny
第5题
They're diamonds!
For hundreds of years men have risked their lives searching for diamonds. To many the discovery of this glittering treasure has seemed more important than the discovery of new lands. Fairy stories tell of brave knights who battled fierce dragons and evil wizards to win kingdom rich with diamonds. In the Tower of Ion- don in England, there is a very special room protected by guards. There, inside a thick glass case, are jeweled crowns once worn by kings and queens. People from all over the world come to see the shimmering diamonds and other precious stones that shine from behind the glass.
Most diamonds seem to flash with a kind of white fire. But there are diamonds that sparkle in other colors, too. Sometimes diamonds are discovered in gravel at the bottom of rivers and streams. (To get these diamonds, the gravel is sucked up through giant hoses that act like vacuum cleaners.) Diamonds are found in rivers, on land, and in great stretches of hot desert sand. A few small ones are even found or near meteorites that strike the ground from outer space.
But most diamonds are found in rocks deep inside the diamond mines of Africa. The diamonds were made millions and millions of years ago when flaming volcanoes melted a mineral called carbon which was a part of these rocks. Gigantic earthquakes shook the rock and pressed them tightly together. The hot melted carbon in the rock squeezed at the same time--squeezed so tightly that by the time it cooled, it had changed into the lovely hard gems called diamonds.
To get at these valuable diamond rocks, workers ride in an elevator that goes down and down into the blackness far below the ground. Tunnels connect this deep shaft with the openings--called pipes--inside the ancient volcanoes.
When they are first dug from the mines, diamonds don't glitter or sparkle as they do when we see them in rings or other jewelry. They look more like dull bits of glass. A man who knows all about diamonds--a diamond cutter--must cut them just right. Diamonds are so hard that nothing can cut them except the edge of an- other diamond.
Using his diamond-edged tools, the diamond cutter carefully removes tiny pieces so that the diamond will have many sharp edges and smooth surfaces--like little windows. It is because of these shaft edges and smooth surfaces that the diamond reflects light, sparkles and flashes with tiny bursts of color, and seems almost ablaze with fire. Diamond cutters often use diamond saws. The fine powder--diamond dust--that is left after the sa- wing is done can be used in a kind of sandpaper to polish the sparking gems.
Not all diamonds are clear enough or pretty enough or large enough to be made into jewelry. But because they are so hard, they can be used for other things, such as points for drills and needles for record player. These diamonds are called industrial diamonds. Some of them are man made. Carbon is heated until it is hot and then squeezed. If men ever learn how to make it hot enough and to squeeze it tightly enough, they will probably be able to make big diamonds. Then maybe diamonds will be cheap enough to use as buttons on your shirt or coat! (610)
The following are the characters of diamonds EXCEPT ______.
A.they sparkle and glitter in the light
B.they are very hard
C.they are very valuable
D.they are tiny
第6题
A.many of them will soon be in charge of the country
B.older people are always trying to understand them
C.they are active and interesting
D.they always make trouble in families
第7题
A.Y
B.N
C.NG
第8题
A.They are very optimistic and therefore haven't done anything about it.
B.They are very anxious and have began to reduce harmful emissions.
C.They are uncertain and therefore take a wait-and-see attitude.
D.They don't think the earth will be too hot to live on, hence they take a passive attitude.
第9题
A.you are
B.they are
C.it is
D.the other is
第10题
A.you are
B.they are
C.it is
D.the other is
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