In the botanic garden we can find a（n）______o...

In the botanic garden we can find a（n）______of plants that range from tall trees to small flowers.

高三英语单项填空简单题查看答案及解析

We'd better grow the plant in a ________ plastic box so that the children can see the roots growing.

A．safe　     B．square

C．transparent　     D． thick

高三英语单项填空中等难度题查看答案及解析

---Do I have to bring my camera tomorrow afternoon?

---I think so．We _______ the Botanical Garden then.

A．will be visiting

B．are visiting

C．have visited

D．visit

高三英语单项填空中等难度题查看答案及解析

-Do I have to bring my camera tomorrow afternoon?

-I think so. We　 　　　　　　 the Botanical Garden then.

A. are visiting　　　　　　　　　　　　　　　　　　　　 B. will be visiting

C. have visited　　　　　　　　　　　　　　　　　 　　　 D. visit

高三英语单项填空中等难度题查看答案及解析

-Do I have to bring my camera tomorrow afternoon?

-I think so．We　　　　　 the Botanical Garden then.

A．are visiting　　　　　　　 B．will be visiting

C．have visited　　　　　　　 D．visit

高三英语单项填空中等难度题查看答案及解析

Meanwhile, on the top of each tower, a botanical garden will offer a relaxing space ________ visitors can enjoy nature, away from the noise of the city.

A. that　　 B. where

C. when　　 D. which

高三英语单项填空困难题查看答案及解析

New findings from Queen’s University biologists show that in the plant world, bigger isn’t necessarily better.

“Until now most of the thinking has suggested that to be a good competitor in the forest, you have to be a big plant,” says Queen’s Biology professor Lonnie Aarssen. “But our research shows it’s virtually the other way around.”

Previous studies showed that larger plant species monopolize(垄断) sunlight, water and other resources, limiting the number of smaller plant species that can exist around them. But the research has proved that this is not generally the case in natural vegetation.

In the Queen’s project, PhD student Laura Keating targeted the largest “host plants” of 16 woody plant species growing in the Okanogan Valley, British Columbia. The research team calculated the number and variety of plants that neighbored each large host plant. They then randomly selected plots without host plants and calculated the plant species there as well. The research showed that the massive trees have no effect on the number of species with which they coexist.

Smaller plants have many advantages over their overbearing neighbors, Professor Aarssen notes. Larger species generate physical space niches under their shelters where smaller species grow well. Smaller plants are much more effective than large trees at using available resources. They also produce seeds at a much younger age and higher rate than their bigger counterparts, and settle down much more quickly—thus competing with the newly-born plants of larger species.

1. What’s the main idea of the text?

A. Smaller plants may have many advantages over their neighbors.

B. In the plant world, the bigger is better than the smaller one.

C. To be a good competitor in the forest, you have to be a small plant.

D. Queen’s University’s students made a new research.

2. The underlined word “this” in Para. 3 refers to the view that _____.

A. large and small plants can grow together in harmony　　

B. larger plant species limit their smaller neighbors’ growth

C. small plant species have their own advantages

D. large and small plant species can never coexist

3.What can we learn according to the text?

A. Larger plant species limit the number of smaller ones around them.

B. Smaller plants can limit the number of plant species around them.

C. Smaller plants produce seeds at a higher rate than their bigger counterparts.

D. Larger trees are more effective than small plants at using available resources.

4. Which is the CORRECT order in the Queen’s project?

a. Randomly selected plots without host plants and-calculated the plant species.

b. Calculated the number and variety of plants that neighbored each large host plant.

c. Selected the largest individuals or "host plants" of 16 woody plant species.

A. a, b, c                B. c, b, a

C. b, c, a                D. a, c, b

高三英语阅读理解中等难度题查看答案及解析

Companion planting is the idea that some kinds of plants can help each other grow. Plants that are compatible together generally have similar needs in terms of nutrients, soil and moisture levels.

Advice about which plants are compatible is sometimes based more on tradition than proof. But experts say there is evidence to support certain combinations. These can improve harvests, reduce disease and help with pest control by attracting helpful insects.

For example, some kinds of soil bacteria take nitrogen from the air and make it into a form that plants can use. The plants hold the nitrogen in their roots. Legumes（豆科植物）are especially good at this nitrogen（氮）-fixing. Then any crops that share the same space with the legumes can get the nitrogen when the roots are broken down.

Beans and potatoes can also share territory well because their roots reach different levels in the soil. Deep-rooted vegetables get nutrients and moisture from lower down in the soil, so they do not complete with plants with shallower roots.

But some plants placed together may harm each other’s development. For example, tomatoes do not like wet soil but watercress does, so you would probably want to keep them separated.

Some kinds of produce should be kept apart even after being harvested. This is because of ethylene gas（乙烯气体）. Ethylene is a plant hormone（激素）that can cause some foods to ripen too quickly. Apples release ethylene gas. Apricots, melons and tomatoes also release a lot of ethylene. Some vegetable are easily affected by ethylene, including asparagus, broccoli, cabbage and cucumbers.

This risk of ripening too soon is why markets often separate high ethylene-producing foods from those that are sensitive to the gas. But if you put an apple in a bag with a green banana, the ethylene from the apple will make the banana ready to eat sooner.

What about peaches, plums and nectarines? These kinds of fruit do not need any help from an apple—they release enough ethylene to ripen themselves. But that does not mean there is no way to get the job done faster.

Growers suggest placing the fruit in a fruit bowl or in a paper bag with the top folded over. Keep the fruit at room temperature, out of direct sunlight. Once the fruit is soft enough, either use it or put it in the refrigerator to keep it from getting too ripe.

1.Companion planting refers to the idea that ________

A. some crops can grow together to benefit each other.

B. some crops have the similar needs of nutrients, soil and water level.

C. some plants can damage each other if grown together.

D. a good farming method to prevent natural disasters.

2.According to the text, ________cannot grow together.

A. beans and potatoes　　 B. tomatoes and watercress

C. legumes and corns　　 D. rice and sugarcane

3.What is the function of ethylene?

A. To improve the quality of fruits.　　 B. To produce a poisonous gas.

C. To keep vegetables fresh.　　 D. To make fruits ripe earlier.

4.The text is most likely to be taken from ________.

A. a newspaper of medicine　　 B. a magazine of biology

C. a journal of agriculture　　 D. a travel report

高三英语阅读理解中等难度题查看答案及解析

After losing one of his legs in the accident, we can imagine that he will have a lot of difficulties to overcome in the years ______.

高三英语单项填空简单题查看答案及解析

All we need        a small piece of land where we can plant various kinds of fruit trees throughout the growing seasons of the year.

A.    are    B. was    C. is    D. were

高三英语单项填空中等难度题查看答案及解析