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【简答题】

Who hasn’t enjoyed eating peanuts? Did you know that although peanuts look like nuts and taste like nuts, they aren’t nuts at all? They belong to the pea family, so they are called peanuts. The peanut grows flowers above ground, but its “fruit” grows underground. It grows in more countries than most other “nuts”.
The peanut is a native South American plant. Scientists believe that it grew wild in Brazil long ago. They think that for several thousand years the early peoples of South America made it a part of their diet. These peoples were nomads who moved on when a natural food could no longer be found in one area. Along the way they probably let fall some peanuts, which got into the ground and grew. This is believed to be the way the plant reached the place where the Incas(印加人)lived. The Incas, from about 1100 to 1532, thought highly of peanuts. The peanuts were eaten in several forms and used as sacrificial offerings(祭品)to the Incan Sun God. Later in the 16th century, European soldiers had brought peanuts to other parts of the world, including North America, Africa, Asia, Europe, and Pacific Islands.
Although peanuts were found native in South America, they are now grown in almost every country that has warm weather. India produces the most peanuts. China’s production is next, followed by the United States.
The peanut is special in more ways than one. It can be eaten raw, boiled, roasted, or fried. Hundreds of widely different products have been made from it. Carver, an American scientist, set himself the task of discovering new uses for eating and for many other products.
Peanuts are very highly nutritious and are also high in protein (蛋白质). Americans use about seven-tenths of their protein in the form of meat. In India, where the poor can’t pay for meat or milk, peanut meal and peanut milk have been produced. These have been a great help to the poor.
New products are continually being made from peanuts, among them peanut cheese and a powder that becomes peanut butter when water is added. The fact is that peanuts are so healthy that they were used by astronauts. The unusual nut that isn’t a nut is one of nature’s most amazing gifts.
小题1: Although we like eating peanuts, many of us don’t know peanuts belong to _______ family.A.the peaB.the nutC.both the pea and the nutD.neither the pea nor the nut小题2: Which paragraph(段落)mainly talks about the history of the peanut?A.Paragraph FourB.Paragraph ThreeC.Paragraph TwoD.Paragraph One小题3:What does the underlined word nutritious mean?A.Helpful for staying healthy.B.Helpful to the poor.C.Delicious and tasty.D.Rich in fat and oil.小题4: Which of the following is TRUE according to the article?A.Nomads always stayed in the same place.B.The peanut was first found in South America.C.Astronauts ate lots of peanuts to keep healthy.D.China grows fewer peanuts than the US.小题5:What is the purpose of the article?A.To show that peanuts belong to the pea family.B.To advise us to use more peanut products.C.To tell us some new uses of peanuts.D.To let us know more about peanuts.

题目标签:祭品白质蛋白质
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【单选题】营养学家建议我国青少年要多吃奶、蛋、鱼、肉等含蛋白质丰富的食品,因为蛋白质是:( )

A.
人体主要的供能物质
B.
容易消化的物质
C.
人体生长发育必需的物质
D.
人体的备用能源物质

【单选题】蛋白质的等电点是指()

A.
蛋白质溶液的pH值等于7时溶液的pH值
B.
蛋白质溶液的pH值等于7.4时溶液的pH值
C.
蛋白质分子呈正离子状态时溶液的pH值
D.
蛋白质分子呈负离子状态时溶液的pH值
E.
蛋白质分子的正电荷与负电荷相等时溶液的pH值

【单选题】蛋白质属于()

A.
植物化学物
B.
宏量营养素
C.
微量元素
D.
宏量元素
E.
抗氧化营养素

【单选题】()为蛋白质的基本结构。

A.
一级结构
B.
二级结构
C.
三级结构
D.
四级结构

【单选题】属于蛋白质和氨基酸的代谢试验的是

A.
VP试验
B.
吲哚试验
C.
氰化钾试验
D.
硝酸盐还原试验
E.
触酶试验

【单选题】凯氏定氮法测定蛋白质含量的原理是

A.
各种蛋白质都由氨基酸组成
B.
各种蛋白质都有基本相同的含氮比例
C.
各种蛋白质均含有大至相同比例的肽键
D.
各种蛋白质均能放出一定量的氮气

【单选题】蛋白质的一级结构指的是

A.
蛋白质的 α- 螺旋结构
B.
蛋白质分子的无规则卷曲
C.
蛋白质分子内氨基酸以肽键相连接
D.
蛋白质分子内氨基酸的排列顺序