In November 2023, China launched a three-year action plan to promote the use of bamboo as a replacement
The look and feel of bamboo are absolutely above and beyond plastic,
This super-powered plant is actually a grass and looks like a weed in terms of
2 . Honeybees command a lot of attention in insect conservation circles, as they are important for pollinating our food supply. But the findings from researchers emphasize the importance of prioritizing other pollinators or insects like wild bees, moths and butterflies in conservation efforts, too.
For the study, ecologists Joshua Kohn and Dillon Travis from the University of California, painstakingly tracked the pollination of flowers from two plant species in San Diego — white sage and Phacelia distans. Often Travis sat for hours waiting for a single pollinator, honeybees or other insects, to land on a flower. Each time he put a mesh (网状的) bag on the flower to prevent any new visitor, then back to collect seeds from different visitors. Back in the greenhouse, the team grew the seeds, analyzing characteristics that reflected their quality, such as how many seeds grew and survived and how many leaves or flower seedlings (幼苗) grew from them.
They found flowers pollinated by honeybees make fewer and lower-quality seeds than flowers visited by other pollinators. The white sage and Phacelia distans plants produced roughly half the amount of seeds from flowers pollinated by honeybees compared with other pollinators. And Phacelia distans seeds from honeybee-pollinated plants grew into seedlings with fewer flowers.
The researchers also found that honeybees visited about twice as many flowers on one plant before moving to the next than the average of other pollinators, causing honeybees to transfer more pollen in flowers of the same plant, thus resulting in fewer and lower-quality and more inbred (近亲繁殖的) seeds. Other pollinators more often flew between different plants, probably transferring more diverse pollen.
Travis says, “Honeybees’ pollination habit can impact ecosystems and agriculture in the long term. One potential consequence could be that native plant populations decline as next generations become more inbred, reducing biodiversity.”
“It is time to actually shift our dependence for pollination from largely honeybees to other native species as well,” says Jaya Sravanthi Mokkapati, an entomologist at Penn State University.
1. What does paragraph 2 focus on about the research?| A．Its procedures. | B．Its members. |
| C．Its impact. | D．Its significance. |
| A．Honeybees cause big damage to plants’ seeds. |
| B．Honeybees are less selective while pollinating. |
| C．Honeybees’ pollination efficiency is unexpectedly low. |
| D．Honeybees prefer to pollinate flowers of the same plant. |
| A．Misleading. | B．Worrying. | C．Creative. | D．Helpful. |
| A．Native plant populations are declining at a high speed. |
| B．Honeybees’ pollination impacts plant seeds temporarily. |
| C．More attention should be paid to protecting other pollinators. |
| D．Honeybees’ pollination depends more on other native species. |
3 . A solar tree is a structure like a tree that generates solar energy using photovoltaic panels (太阳能光伏板). It helps solve an urgent global challenge: Replacing greenhouse gas-emitting energy sources like oil and gas with renewable energy. But the power generation potential of solar trees is relatively limited, and their primary purpose is to raise public awareness about renewable energy by getting people to notice and interact with solar energy in new ways.
Solar trees generally have a firm metal, plastic, or stone base that extends up and out into “branches” on which solar panels are mounted. Beyond this basic structure, there is great diversity in the design of solar tree units. The solar tree’s photovoltaic “leaves” absorb sunlight, converting it into electricity that is conducted down through the trunk-like central pillar of the structure to an inside battery. Many designs feature rotating (旋转的) panels that can move throughout the day in order to obtain the greatest amount of sunlight.
Solar trees help power homes, businesses, and public services. They can create shade to help reduce the urban heat island effect and provide shelter in severe weather such as rainstorms and heatwaves, creating greater urban adapting ability in the face of climate change. They also enhance public spaces, providing charging stations, and powering streetlights.
In comparison to other kinds of ground-mounted solar panel devices, solar trees don’t require much land. They make solar energy generation possible in areas with little land that can’t support vast solar arrays, as well as places that lack sufficient rooftop space for panels. However, solar panels are much cheaper than solar trees at present and have far greater energy generation capacity. Therefore, present solar tree designs often serve as a extra source rather than as a primary energy source.
At present, solar trees aren’t designed as large-scale solar projects, which limits their ability to contribute to the low-carbon energy transition. Still, their varied designs are appealing. This makes solar trees effective at displaying and thereby educating people about solar energy, and promoting a business or organization’s commitment to renewable energy.
1. What is the main purpose of building solar trees?| A．To beautify the urban environment. | B．To draw public attention to solar energy. |
| C．To replace non-renewable energy resources. | D．To provide charging services in emergencies. |
| A．It stores energy in its own battery. |
| B．It can adjust its height automatically. |
| C．It is made of environmentally friendly materials. |
| D．It transforms sunlight into electricity by its metal base. |
| A．The design features of solar trees. | B．The ways of saving energy in cities. |
| C．The benefits of solar trees to humans. | D．The difficulties of promoting solar trees. |
| A．They occupy much less land. | B．They are cheaper to manufacture. |
| C．They are more effective in generating energy. | D．They can work in various weather conditions. |
4 . When gardeners grow varieties of plants in their beautiful gardens, they are happy to see beneficial insects like bees and butterflies surrounding the flowers. But as they take a closer look, they may find some plants are covered in black dots and filled with harmful insects or pests. Some gardeners may immediately reach for chemicals.
If you are wise gardeners, you should first take preventive measures to control the harmful insects.
Prevention
As a rule, prevention is the best treatment. Inspect plants closely, including their leaves, before buying them from the store.
When planting, space plants out to permit them to grow to their full size. Plants too close together can breed harmful organisms, like bacteria.
Pesticides
If you decide a pesticide is necessary, choose it carefully and follow the directions and warnings on the product. Avoid using pesticides in extreme heat, on windy days, or when the plants are wet.
| A．But this is not wise. |
| B．In most cases, chemicals don’t help. |
| C．Treat the plants early in the morning or at night. |
| D．Also do remember the plants need nutrition and care. |
| E．Keep your garden free of fallen leaves, fruits and other wastes. |
| F．Do not bring any plants home that show signs of disease or pests. |
| G．The process starts with the idea that having some pests is acceptable. |
