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Ideas about education are changing in the United States. Education today is not just a high school diploma or a college degreE.Many adults are not interested in going to collegE.They are interested in other kinds of learning. For them, learning does not end with a diplomA.
Continuing education gives these adults the opportunity to increase their knowledge about their own field or to learn about a new fielD.It also gives them a chance to improve their old skills or to learn new ones.
Continuing education classes give some adults the chance to learn new skills. There are usually many kinds of classes to choose from, foreign cooking, auto repair, or furniture repair. These are only some of the classes availablE.
Some adults take classes for fun or because the class will be useful for them. For example, they can choose a class in almost any language as a second languagE.There are classes in first aid or classes in sewing. There are also many other types of classes to choose from.
Other adults take continuing education classes to improve their own lives because they want to feel better about themselves. Overweight people can find exercise classes or classes in nutrition. Others can learn how to be good parents, or how to get along with other peoplE.
There are many opportunities for adults to continue their learning. Almost any community college or public school system has a continuing education program. There are classes in schools, community buildings, or churches. Most classes are in the evening, so working people can attenD.The classes are usually small, and they are inexpensivE.
Thousands of people register for continuing education classes each year. They receive no diploma or certificate, and no grade for most of the classes they attenD.For them, learning is something they do because they want to.
Some adults go to continuing education classes to ______.
A.get a college education
B.learn new skills
C.get a certificate
D.earn grades

A.B.
C.
D.
E.
F.
G.
Some
H.
A.get
I.learn
J.get
K.earn

【参考答案】

B
解析:事实细节题。第三段第一句“Continuing education classes give some......

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A metal with a built in memory is one of the very useful discoveries made during America's space program. Nitinol was discovered by scientists working at the Naval Surface Weapons Center. They were looking for heat shield metals for missiles and satellites, but what they found was nitinol. This alloy can be formed into shapes just like any other metal, but it returns to its original form. at a certain temperaturE.When this alloy of nickel and titanium is first formed, it is shaped into ingots, brick shaped masses of the metal. Then it is drawn out into a wire of varying thickness, depending on the job it is destined to do. It is set into its desired curve or shape and heated briefly. It is then cooled off by dipping the wire in cold water. This 'sets' its memory. The metal can then be formed into any desired shape, but whenever its temperature exceeds its room temperature, ' it returns to the shape it has memorizeD.This makes nitinol perfect, of course, for, spacecraft, for antennas, probes, shields, and folding 'arms' made of nitinol can be stored safely inside a spacecraft, protecting them from damage during launching. Then, once safe in orbit, the spacecraft would suddenly 'grow' antennas and other structures. The sun's rays would have warmed up the folded and coiled nitinol, and it would have returned to its original shapE.But scientists have found a more down to earth use for this wire: they now use it to strengthen teeth. Before nitinol, teeth that needed straightening have brackets attached to them; wires were attached to these to exert a pull in the right direction. But this pull must be constant, and the stainless steel arch wire cannot exert the correct force if it has been bent several times or if the tooth has actually moved toward it as planneD.As a result, many people with dental braces must have the wire replaced monthly, tightened every few weeks, or adjusted painfully tight at the beginning of the treatment.But nitinol wires can be formed to exert force in a certain direction, cooled of and then reformed to fit the patient's mouth. As the mouth warms the nitinol, it begins to try to assume its preset shapE.This exerts a steadier, more constant pull on the tooth than could ever be achieved with stainless steel wirE.Nitinol can be bent into such intricate shapes — while maintaining its pull — that very difficult treatments, such as moving one tooth from behind another, can be done now without the expense or pain of constant adjustment. Nitinol has cut tile time needed for these treatments by almost half, a real benefit for both patient and dentist.The main idea of this passage is that ______.A.nitinol is a highly versatile metalB.nitinol helped make the space program a successC.nitinol has revolutionized dental careD.most alloys have 'memories'
A.B.
C.
D.
E.
The
F.
A.nitinol
G.nitinol
H.nitinol
I.most