Question

阅读理解 　　Water is necessary for life and good health．We often forget this fact when we think about the other building blocks of life such as vitamins, minerals and proteins．We can live for many days without eating, but two or three days without water usually leads to death． 　　The human body may look solid, but most of it is water．Newborn babies are as much as 85％water．Women are about 65％water and men are about 75％water．Women usually have less water than men because women generally have more fat cells(细胞), which hold less water than other kinds of cells． 　　Water does many different things to keep us healthy．It carries hormones(激素), antibodies(抗体)and foods through the body, and carries away waste materials．This is why different parts of the body contain different amounts of water．For example, blood is 83％water, muscles are 75％water, the brain is 74％, and bones are 25％． 　　Water is necessary for cooling the body on hot days and when we are working hard or exercising, water carries body heat to the surface of the skin, where the heat is lost through sweat(汗水)． 　　Researchers say cold liquids cool us faster than warm liquids, because cold liquids take up more heat inside the body and carry it away faster．They say, however, the cold sweet drinks do not work well because the sugar slows the liquid from getting into the bloodstream． 　　Researchers also note that fat cells stop body heat from escaping quickly．Fat cells under the skin act like warm clothing to keep heat inside．This is why overweight people have a more difficult time staying cool than thin people． 　　The body loses water every day through sweat and urine(尿)．Losing too much, we will become sick．A 10％drop in body water can cause the blood system to fail．A 15％drop usually leads to death．To replace what is lost, health experts say grown persons should drink about 2 liters of water each day, and more in hot weather．We can also get some of the water we need in the foods we eat．Most fruits and vegetables are more than 80％water．Water may be one of the simplest of all chemical substances(物质), but it is the most important substance that we put into our bodies． (1) Water is important to the human body because ________． [　　] A． it can help cool the body on hot days B． the body loses water daily by sweat and urine C． the human body is mainly made up of water D． the foods we eat mostly contain water (2) Men usually have more water than women because ________． [　　] A． women have more fat cells B． men usually lose more water through sweat and urine C． women's bodies contain more vitamins, minerals and proteins D． men have more fat cells (3) Water does the following things to keep us healthy except that ________． [　　] A． it can carry away waste materials B． it can help to cool the body on hot days C． it helps produce blood in the body D． it provides us with proteins (4) What would be the best title for the text? [　　] A． Water and Fat Cells B． Cold and Warm Liquids C． Water and Health D． Water and Humans

Answer 1

答案：1．C;2．A;3．D;4．C;