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Kinds of Iron and Steel第36题：
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Kinds of Iron and Steel
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Woman: Thank you, Chris. You know, today—with so many Americans counting calories and wanting to eat more natural foods—there are many new kinds of bread on supermarket shelves, high fiber bread, wheat germ bread, low calorie bread, to name only a few. Well, despite the variety, the principal ingredients of bread have remained the same. flour, water, and yeast. There may be a few other things added as food for the yeast to help it develop or as agents to assist the baking process, but these additives appear in minute quantities and have little effect on calories or nutrition.
Man: Well, what about the differences between white bread and whole grain bread, Alice？ Is whole grain bread really superior nutritionally？
Woman: Both have their advantages, Chris. Whole grain bread does have more fibers of course, and the bulk which the fiber provides can be useful in digestion. White bread has a finer texture. The reason that so many people feel white bread is nutritionally lacking is the bleaching process. Bleaching, which gives bread its distinctive white color, does remove many nutrients. But what many people are unaware of is that these nutrients are added back into the bread after the bleaching process. And this re-adding process has a distinct advantage for some people. One nutrient that is re-added, iron, is unbounded in white bread whereas the iron which is retained in its natural state in whole grain bread is bonded to other chemical constituents. Studies have shown that some people have difficulty absorbing the bonded iron but can readily absorb the unbounded iron in bleached white bread. Probably the soundest advice for most people is to eat some of both types of bread. And now here's a story which makes the good old days seem that much further in the past. Do you still remember the nickel candy bar that you used to buy on the way home from school when you were a child？ Well, after successive increases to 10, 15, and 20 cents, the old nickel candy bar is now going to cost you a quarter. Candy manufacturers report that the bars will be larger. But, whereas the price is increasing 25%, the average weight increase for a bar is only 14%.
Man：Thank you, Alice. We'll have more news after we return from a commercial break.
19.According to the report, what are the three main ingredients found in bread？
20.What advantage does unbounded iron offer？
21.Which of the following statements about bread is true？
22.What gives white bread its distinctive color？
(39)
A．Fiber, wheat germ and water.
B．Iron, flour and yeast.
C．Yeast, flour and fiber.
D．Flour, water and yeast.
In the modern technology world, the sea offers many resources to help mankind survive.Resources on land are beginning to grow less.The sea, however, still offers hope to supply many of man’s needs in the future.
The riches of the sea yet to be developed by man’s technology are impressive.Oil and gas explorations have existed for nearly thirty years.Valuable amounts of minerals such as iron, copper and so on exist on the ocean floor.
Besides oil and gas, the sea may offer new sources of energy.For example, warm temperature of the ocean can be used as the steam in a steamship.Sea may also offer a source of energy as electricity for mankind.
Technology is enabling man to explore even deeper under the sea.It is obvious that the technology to harvest the sea continues to improve.By 2050, experts believe that the problems to explore the food,
minerals and energy resources of the sea will have been largely solved.
26.What is the proper title for the passage______
A.Needs of Man
B.Sea Harvest and Food
C.Sea and Sources of Energy
D.Sea Exploring Technology
27.It can be inferred from the passage that______
A.man hasn’t completely made use of the riches of the sea
B.technology for exploring the sea has been solved
C.harvesting rice in the sea will be made possible
D.in the near future man can live on the ocean floor
28.Why does the author mention a steamship______
A.To illustrate that man can make use of sources of energy from the sea
B.To show that a steamship is better than other kinds of ships
C.To argue that man should use steamships
D.To indicate that it is warmer in the ocean than on land
29.According to the author, technology is important because______
A.resources on land are running short in ten years
B.man can use it to explore the deeper sea
C.it is a lot of fun diving into the sea
D.ancient people used it to explore the sea
30.According to the author, when will the problems to explore the deeper sea largely be solved______
A.In the next generation
B.By the end of the 20th century
C.In the near future
D.By the middle of the 21st century
A.iron
B.to iron
C.ironing
D.being ironed
A．It directed air at melted iron in a furnace, removing all impurities.
B．It could quickly find deposits of iron ore under the ground.
C．It slowly heated iron ore, then stirred it and heated it again.
D．It changed iron ore into iron, which was a substitute for steel.
Steel is an alloy composed primarily of iron and carbon.
A．traditionally
B．ironically
C．carefully
D．principally
Any kind of iron in the food is a contributor to the development of breast cancer.
A．Right
B．Wrong
C．Not mentioned
Iron was used earlier than copper by the early inhabitants of the Americas.
A．Y
B．N
C．NG
