their eggs have non vitamins D. they are not allowed to move about and eat freely 相关知识点: 试题来源: 解析 D解析:参阅第三段第一句:“天然食品还包括那些一直在富饶的牧场上自由走动觅食的.动物”。由于笼式养鸡场的鸡不让自由走动觅食,所以不能称之为“天然食品”。可见选D。反馈 收藏 ...
{{B}}Text 1{{/B}}Battery chickens cannot be called "natural food" because ___. A.they live in crowded conditionsB.they are tastelessC.their eggs have non vitaminsD.they are not allowed to move about and eat freely 相关知识点: 试题来源: 解析 D [解析] 参阅第三段第一句:“天然食品...
FoodPoultryThe poultry industry plays an important role in meat production/supply, with a growth rate of more than 4% p.a. in the last few years. This white meat production requires a large amount of feed that increases competition in the use of natural resources for primary food and other...
Chickens can be called "natural foods" only when ___. A、 they are delicious B、 they are fed on food little better than rubbish C、 they lay eggs rich in vitamins every day D、 they are allowed to move about and eat freely 无解析
Chickens can be called natural foods only when___.A.they are deliciousB.they are fed on food little better than rubbishC.they lay eggs rich in vitamins every dayD.they are allowed to move about and eat freely
重点句型 1.Chickens and even pigs were ___ nervous ___eat,and dogs refused to go inside buildings. 鸡甚至连猪都太紧张而不能吃东西,狗也不愿意进屋里去。 2.Soon after the quakes,the army sent 150,000 soldiers to Tangshan to dig out___. 地震刚刚过去,部队派出了15万名战士奔赴唐山,将受困...
[03:13.63]alfalfa or coloring products in food for chickens. [03:17.30]Elizabeth Bobeck is a professor at Iowa State University. [03:23.72]She says that yolk color is mainly caused by the carotenoids that chickens eat. [03:30.78]Carotenoi...
“Fodder” simply refers to food for livestock. You can grow grains, vegetables, or fruits to supplement their diet, as chickens are omnivores and can eat almost anything you eat. There is no need to do this during the warmer months if they have access to good habitat outdoors, but in ...
This persistence has been demonstrated for switching search between two colours of food and in moving from one position of search to another. Naturally circulating levels of androgens will produce this effect. Adult hens were found to be less persistent than cocks. Antiandrogen treatment of cocks ...
根据第一段内容“Insects are a rich source of protein and part of the natural diet for pigs, chickens and fish. Feeding insects to farm animals could be the environmental change that the farming industry has been waiting for.( 昆虫是蛋白质的丰富来源,也是猪、鸡和鱼的天然饮食的一部分。给农场...