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这是关于饮食中的维生素的一个问题，实际上这篇文章应该说在某个地方我们应该碰到过。 Questions 11 to 15 are based on the following passage:
The vitamins necessary for a healthy body are normally supplied by a good mixed diet (饮食) ,一个健康的身体所必需的维生素通常提供一个良好的混合饲料（饮食），包括各种各样的水果和蔬菜。（79）只有当人们试着生活在一个非常有限的饮食，它是必要的，作出特别的规定，供应失踪的维生素。
An example of the dangers of a restricted diet may be seen in the disease known as“beri-beri”. (80) It used to distress large numbers of Eastern peoples who lived mainly on rice. In the early years of this century, a scientist named Eijkman was trying to discover the cause of “beri-beri”. At first he thought it was caused by a germ. He was working in a Japanese hospital, where the patients were fed on polished rice which had the outer husk (外壳) removed from the grain. It was thought this would be easier for weak and sick people to digest.
节食的危险的例子可以看出，这种疾病被称为“beri beri”。（80）它用来困扰大量居住在水稻上的东方人。在本世纪初，一位名叫Eijkman试图发现“脚气病”产生的原因。起初，他认为是由一种细菌引起的。他在日本的医院，那里的病人吃精米有外壳（外壳）从颗粒去除。它被认为这将是更容易为弱和生病的人消化。
Eijkman thought his germ theory was confmned when he noticed the chickens in the hospital yard, which were fed on leftovers (剩饭) from the patients' plates, were also showing signs of the disease. He then tried to isolate the germ, but his experiments were interrupted by a hospital official, who declared that the polished rice, even though left over by the patients, was too good for chickens. It should be recooked for the patients, and the chickens should be fed on cheap rice with the outer layer still on the grain.
Eijkman认为他的生殖理论推导时，他注意到在医院的院子里的鸡，饲喂对剩菜（剩饭）从患者的板块，也出现了这种疾病。然后，他试图隔离细菌，但他的实验被一家医院的官员打断了，他宣布，抛光的米，即使是病人留下的，对鸡太好了。应该recooked的患者，并应给鸡喂食廉价大米外层仍然在粮食。
Eijkman noticed that the chickens began to recover on the new diet. He began to consider the possibility that eating unpolished rice somehow prevented or cured "beri-beri" -- even that a lack,of some element in the husk might be the cause of the disease. Indeed thiswas the case.
Eijkman注意到，鸡开始恢复的新的饮食习惯。他开始考虑的可能性，吃糙米某种预防或治愈“脚气病”甚至缺乏，中的一些元素的外壳可能是疾病的原因。事实上这是个案。
The element needed to prevent “beri-beri” was shortly afterwards isolated from Ace husks and is now known as vitamin B. Nowadays, this terrible disease is much less common thanks to our knowledge of vitamins.
元素需要防止“脚气病”不久后分离埃斯皮现在被称为维他命B 今天，这个可怕的疾病，由于我们的知识是不太常见的维生素。
11. A good mixed diet______.
【答案】A它说一个好的、混合的饮食会怎么样，这个很简单，答案就在我们这个文章第一段的第一句话，第一句话说我们一个健康的身体所必须的维他命正常情况下都可以通过一个健康的、混合的饮食来获得，这很显然答案应该是A，就是说一个好的、混合的饮食，
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