题目内容
（请给出正确答案）
The majority of farmers in the Rhone Valley ______.
A．do the great part of the farm work in the valley
B．work in factories in the valley and travel from their farms in the mountains daily
C．work long hours a day
D．work at some other jobs besides farm work
安装简答题APP，拍照搜题省时又省心！
更多“The majority of farmers in the…”相关的问题
How do butterfly ranches and farms operate？ One pioneering project developed by the government of Papua New Guinea encouraged farmers to take part in commercial exploitation of a renewable resource--insects. In the 1970s, government officials became aware that expatriates involved in the commercial collection of insects were enlisting the aid of local farmers who lived adjacent to rainforest habitats. The farmers were paid a small fraction of the market value of the specimens. The government was determined to change this state of affairs to ensure the locals received a larger share of the profit. So the expatriates were expelled from the country, and the Insect Fanning and Trading Agency was born. Most of the trade managed by the IFTA consists of wild-caught insects from rain forests.
In the case of wild-caught butterflies, the majority captured by IFTA collectors are males due to behavioral differences between the sexes. (Males aggregate along river banks to imbibe sodium and are easier to capture.) Because males mate more than once, as long as the harvest of wild populations has the expected skewed sex ratio, the impact of collecting is minimal relative to naturally occurring predation. Now the IFTA controls all trade in insect specimens and has fostered a program of butterfly ranching to encourage protection of remnant rainforest habitats in the vicinity of a farm or village.
The basic principle behind butterfly ranching is diversification of crops in a small garden plot to include the host-plants on which caterpillars feed. Only a small fraction of these larval host-plants are known to science. The main "research and development" activity of butterfly ranchers is discovering unknown host-plants through careful observation of egg-laying female butterflies. Once the host of a particular species is known, it can be cultivated in the garden near the edge of the rain forest to attract egg-laying females. If the natural concentration of a particular plant species is one per square mile of rain forest, and a farmer plants several dozen of the species, the result is a dense concentration of caterpillars in a short time. Butterfly ranching thus involves artificial manipulation of the natural density of caterpillar host-plants.
Additionally, flowering plants, such as Hibiscus and Lantana, attract female butterflies, which need the nectar to renew their energy reserves after a bout of egg-laying. After the caterpillars mature, they are harvested and removed to cages for pupation. The IFTA sends out advisors to instruct villagers in butterfly husbandry techniques. Many farmers have learned that they can sell butterflies to supplement their income if they protect the remnant patches of rain forest that form. a reservoir for this renewable resource.
Along with the studies of butterflies, ______ emerges.
A．academy's newest exhibit
B．a model organism
C．a farm
D．a new business
His experiences on the farm proved(to be)a turning point in his writing career．
Which of the following is NOT true according to the passage？
A．The farm sells its vegetables to a local supermarket.
B．The farm uses less water and energy to grow vegetables.
C．The farm causes less pollution in its production.
D．The farm sells at the same price as imported produce.
A、become a school teacher
B、operate a farm
C、sell his farm
D、leave for England
Inland canals are used to (shipping) farm and factory (goods) to (nearby) town (or) seaports.
A．shipping
B．goods
C．nearby
D．or
A．He wanted to keep the farm as it was.
B．He was eager to become a farm owner.
C．He hoped to enlarge the forest on the farm.
D．He was afraid the owner might change his mind.
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
微信搜一搜
简答题
微信搜一搜
简答题
如搜索结果不匹配，请 
