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更多“tree的复数形式是trees（）”相关的问题
The scientists are interested in studying tree rings because they can tell______.
A．whether in that area the climate was healthy or not
B．whether a particular tree was healthy or not
C．whether people, took good care of the trees or not
D．how old the trees were
Willow(柳树) trees are the best-known of these trees. When insects begin nibbling(叮咬) a willow tree, the tree sends out a special smell at once. This smell tells the other willows that harmful insects are coming near. All of them quickly make a chemical(化学物质) in their leaves. This chemical is bad to the insects. The insects do not like it and they fly away soon. In this way, the willow trees protect themselves from the insects.
The next time when you take a walk in the woods, maybe the trees are “talking” to each other quietly. And when someone says that trees cannot “talk”, please tell them that even trees give messages to each other, too.
Willow trees send messages with _________.
A.words
B.movements
C.smells
D.sounds
The underlined word “lips” in the first paragraph means ________.A.树干
B.嘴唇
C.枝条
D.手势
The passage tells us that some of the trees can ________.A.speak just as people do
B.tell stories to others
C.communicate with each other
D.kill insects in the woods
According to the passage, the right order of the following is ________. a、 The willow tree gives out a smell. b、 The willow trees make a chemical in their leaves. c、 Insects fly away because of the chemical. d、 Insects begin nibbling a willow treeA.d-a-b-c
B.d-b-a-c
C.a-b-c-d
D.d-c-b-a
请帮忙给出每个问题的正确答案和分析，谢谢！
The writer's purpose when writing this passage is______.
A. to describe how pruning a tree is done
B. to discuss different ways of pruning trees
C. to give practical instructions for pruning a tree
D. to explain how a tree wound gets diseased and heals
According to what God told them, Adam and Eve could ______.
A．enjoy everything except the apples from the Tree of Knowledge
B．learn know[edge from apple trees
C．share apples from the Tree of Knowledge with the animals
D．eat more than one apple from the Tree of Knowledge
It is understood that in a favorable climate______.
A．tree rings grow close together
B．tree rings grow far apart
C．trees in New Mexico will grow big and tall
D．people can cut down most of the trees in New Mexico
Trees should only be pruned (修剪) when there is a good reason for doing so. Many gardeners believe that more damage results from doing it unnecessarily than from leaving the tree to grow in its own way.
First, pruning may be done to make sure that trees have a desired shape. The object may be to get a tree of the right height, and to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut out diseased or dead wood, or branches that are rubbing against each other and thus causing wounds. A tree may grow healthier by removing the branches that are locking up the centre and so preventing the free movement of air.
One result of pruning is that an open wound is left on the tree and this provides an easy entry (进入) for diseases, but it is a wound that will heal. Often there is a race between the healing and the disease as to whether the tree will live or die. Pruning is usually clone in winter, for then you can see the shape of the tree clearly without the interference from the leaves.
According to the article, which of the following statement is NOT true？
A．Pruning is necessary when there are unwanted branches.
B．Damage is done to a tree if it is left to grow in its own way.
C．Diseased or dead branches should be cut away if they are found to rub against each other.
D．Growing side branches often prevent air from moving freely.
Trees should only be pruned (修剪, 整枝) when there is a good and clear reason for doing so and, fortunately, the number of such reasons is small. Pruning involves the cutting away of overgrown and unwanted branches, and the inexperienced gardener can be encouraged by the thought that more damage results from doing it unnecessarily than from leaving the tree to grow in its own way. First, pruning may be done to make sure that trees have a desired shape or size. The object may be to get a tree of the right height, and at the same time to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut out diseased or dead wood, or branches that are rubbing against each other and thus causing wounds. The health of a tree may be encouraged by removing branches that are blocking up the centre and so preventing the free movement of air. One result of pruning is that an open wound is left on the tree and this provides an easy entry for disease, but it is a wound that will heal. Often there is a race between the healing and the disease as to whether the tree will live or die, so that there is a period when the tree is at risk. It should be the aim of every gardener to reduce that risk of death as far as possible. It is essential to make the wound on the tree which has been pruned smooth and clean for healing will be slowed down by roughness. You should allow the cut surface to dry for a few hours and then paint it with one of the substances available from garden shops produced especially for this purpose. Pruning is usually done in winter, for then you can see the shape of the tree clearly without interference from the leaves and it is. too very unlikely that the cuts you make will bleed. If this does happen, it is, of course, impossible to paint them properly.
Pruning is probably usually done to______.
A．make the small branches thicker
B．get rid of the small branches
C．improve the shape of the tree
D．make the tree grow taller
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Joachim's vision is based on an idea called pleaching (编织), where tree branches are grown so that they naturally weave together. Since the growth patterns of trees are {effected; affected; attempted} by wind and sunlight, it may be possible to control the way a tree develops.
These Fabricated Tree House Habitats would use trees grown into shapes as housing. One of the {purposes; disadvantages; advantages} of these designs is that trees would not have to be cut down for lumber.
"A 100 percent treehouse would take years to create," Joachim said.{Depending on; Judging by; Protected from} the climate, a house could take anywhere from 5 to 30 years to grow. Fortunately, there's a way to speed up the process. Joachim suggests including ecological materials such as sod (草皮), grasses and living branches in the housing designs. "This material would be able to move as the house grows," Joachim said.
A home would become an actual ecosystem, a community of plants, animals, and bacteria working together. The trees would also give off water vapor that would assist in {cleaning; heating; cooling} the homes. Solar panels and wind would help provide energy. The tree homes might even have soil pockets, where plants could grow from the structure itself.
Work has already begun on Joachim's first design—a house made from 50 percent recycled and 50 percent living things. Joachim is confident about the {happiness; benefit; importance} of his work, as he uses natural products without destroying nature.
"The environment and its study are very important. We need to respect nature, don't take it for granted," he said.
