Links分为（）和（）。

Links链接

A recent development is the local area network (LAN). (21) its name implies, it (22) a local area—possibly as small as a single room, typically an area like an university campus or the premises of a particular business. Local area networks were developed to (23) a need specific to microcomputers—the sharing of expensive resources. Microcomputers are cheap, (24) highcapacity disc stores, fast and/or good quality printers, etc. are expensive. The object of the LAN is to allow (25) microcomputers shared access to these expensive resources. Since the microcomputers are (26) , it is a necessary feature of a LAN that the method of connection to the network, and the network hardware (27) , must also be cheap.
A local area network links a number of computers and a number of sewers (28) provide communal facilities, e. g. file storage. (A server usually includes a small microprocessor for control purposes.) The computers and servers are known (29) stations. There are two methods of (30) in common use, tings and broadcast networks.
In the ring method( often called a Cambridge Ring)all the stations are linked in a ring, (31) includes one special station, the monitor station.
In broadcast networks, all the stations are (32) to a single linear cable (usually co-ax cable), and any transmission will be received by all stations.
(33) technology is used, local area networks are a development of the greatest importance. (34) as programming is simplified by an approach that thinks in terms of small procedures or programs, each doing a well-defined job, the computer system of tomorrow is likely to be (35) lots of small systems, each doing a specific job, linked by a local area network.

A:linked B:linking C:to link D:links

A
Everything living on earth--plants and animals need other living things. Nothing lives alone. Most animals must live in a group, and even a tree or a plant grows close together with others of the same kind. Sometimes one living thing hunts another; one eats and the other is eaten. Each kind of life eats another kind of life in order to live, and together they form a food chain. Some food chains are simple; others are complicated. But all have two things in common--all food chains begin with the sun, and all food chain become broken up if one of the links disappears. All life depends on energy from sunlight. Only plants can use this energy directly. Their leaves are little factories that use sunlight to make food from water and things in the soil and air.
Plants in turn feed all other living things. Animals can only use the sun’s energy after it has been changed into food by plants. Some animals feed directly on plants; others eat smaller animals. Meat-eating animals are only eating plants indirectly.
What about human beings.’ We are members of many food chains. We eat wheat, rice, vegetables, fruit and so on. We also eat meat and drink milk. This means the sun’s energy passes through plant to animal before it reaches us.
Nature is a greater thing. Any food chain always produces enough for each of its members if it is left alone. When there isn’t enough food for any link in chain, some of its members die off. So the balance is broken up.
But men in their greed and ignorance often break up the food chain and do great harm not only to one plant or animal, but to all the links irt the chain. People make seas and rivers dirty. They destroy whole forests and kill many kinds of wild animals and birds. When a river becomes dirty, the fish can’t be eaten. Men eat the fish and get strange disease. In some places men have no fish to eat any more, because the fish have died off. Each form of life is linked to all others. Breaking the links puts all life in danger.

A:One kind of animals is eaten up. B:One kind of plants is destroyed. C:One kind of animals eats another. D:One of the links is destroyed.

A recent development is the local area network (LAN). (21) its name implies, it serves a local area-possibly as small as a single room, typically an area like an university campus or the premises of a particular business. Local area networks were developed to (22) a need specific to microcomputers the sharing of expensive resources. Microcomputers are cheap, but highcapacity disc stores, fast and/or good quality printers, etc. are expensive. The object of the LAN is to allow (23) microcomputers shared access to these expensive resources, since the microcomputers are cheap, it is a necessary feature of a LAN that the method of connection to the network, and the network hardware (24) , must also be cheap.
A local area network links a number of computers and a number of servers which provide communal facilities, e. g. file storage. (A server usually includes a small microprocessor for control purposes. ) The computers and servers are known as stations. There are two methods of (25) in common use, rings and broadcast networks.
In the ring method( often called a Cambridge Ring) all the stations are linked in a ring, (26) includes one special station, the monitor station.
In broadcast networks, all the stations are (27) to a single linear cable(usually coax cable), and any transmission will be received by all stations.
(28) technology is used, local area networks are a development of the greatest importance. (29) as programming is simplified by an approach that thinks in terms of small procedures or programs, each doing a well-defined job, the computer system of tomorrow is likely to be (30) lots of small systems, each doing a specific job, linked by a local area network.

A:linked B:linking C:to link D:links

A recent development is the local area network (LAN). (21) its name implies, it serves a local area-possibly as small as a single room, typically an area like an university campus or the premises of a particular business. Local area networks were developed to (22) a need specific to microcomputers the sharing of expensive resources. Microcomputers are cheap, but highcapacity disc stores, fast and/or good quality printers, etc. are expensive. The object of the LAN is to allow (23) microcomputers shared access to these expensive resources, since the microcomputers are cheap, it is a necessary feature of a LAN that the method of connection to the network, and the network hardware (24) , must also be cheap.
A local area network links a number of computers and a number of servers which provide communal facilities, e. g. file storage. (A server usually includes a small microprocessor for control purposes. ) The computers and servers are known as stations. There are two methods of (25) in common use, rings and broadcast networks.
In the ring method( often called a Cambridge Ring) all the stations are linked in a ring, (26) includes one special station, the monitor station.
In broadcast networks, all the stations are (27) to a single linear cable(usually coax cable), and any transmission will be received by all stations.
(28) technology is used, local area networks are a development of the greatest importance. (29) as programming is simplified by an approach that thinks in terms of small procedures or programs, each doing a well-defined job, the computer system of tomorrow is likely to be (30) lots of small systems, each doing a specific job, linked by a local area network.

A:linked B:linking C:to link D:links

A:linked B:linking C:to link D:links

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