颈部Eaten试验又称为

A:颈牵引试验 B:椎间孔挤压试验 C:臂丛神经牵拉试验 D:椎动脉压迫试验 E:转身看物试验

All that can be eaten ______ eaten up．

A:are being B:has been C:had been have been

It is animals and plants which lived in or near water whose remains are most likely to be preserved, for one of the necessary conditions of preservation is quick burial, and it is only in the seas and rivers, and sometimes lakes, where mud and silt have been continually deposited, that bodies and the like can be rapidly covered over and preserved.
But even in the most favorable circumstances only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them. After all, all living creatures live by feeding on something else, whether it be plant or animal, dead or alive, and it is only by chance that such a fate is avoided. The remains of plants and animals that lived on land are much more rarely preserved, for there is seldom anything to cover them over. When you think of the innumerable birds that one sees flying about, not to mention the equally numerous small animals like field mice and voles which you do not see, it is very rarely that one comes across a dead body, except, of course, on the roads. They decompose and are quickly destroyed by the weather or eaten by some other creatures.

A:All living creatures die in order to be eaten by others. B:All living creatures can be the food of others. C:All living creatures decay. D:Only a small number of living creatures can avoid being eaten by others.

It is animals and plants which lived in or near water whose remains are most likely to be preserved, for one of the necessary conditions of preservation is quick burial, and it is only in the seas and rivers, and sometimes lakes, where mud and silt have been continually deposited, that bodies and the like can be rapidly covered over and preserved.
But even in the most favorable circumstances only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them. After all, all living creatures live by feeding on something else, whether it be plant or animal, dead or alive, and it is only by chance that such a fate is avoided. The remains of plants and animals that lived on land are much more rarely preserved, for there is seldom anything to cover them over. When you think of the innumerable birds that one sees flying about, not to mention the equally numerous small animals like field mice and voles which you do not see, it is very rarely that one comes across a dead body, except, of course, on the roads. They decompose and are quickly destroyed by the weather or eaten by some other creatures.
Which of the following is not true

A:All living creatures die in order to be eaten by others. B:All living creatures can be the food of others. C:All living creatures decay. D:Only a small number of living creatures can avoid being eaten by others.

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.

(Having eaten) the cherry pie, I (struck) several pits and (nearly) (broke) a tooth.

A:Having eaten B:struck C:nearly D:broke

All that can be eaten ______ eaten up．

A:are being B:has been C:had been D:have been

Passage Four

A:All living creatures die in order to be eaten by others. B:All living creatures can be the food of others. C:All living creatures decay. D:Only a small number of living creatures can avoid being eaten by others.

(Having eaten) the cherry pie, I (struck) several pits and (nearly) (broke) a tooth.

A:Having eaten B:struck C:nearly D:broke