[单项选择]{{B}}第二篇{{/B}}

Botany, the study of plants, occupies a peculiar position in the history of human knowledge. For not many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insights(了解). It is impossible to know today just what our Stone Age ancestors knew about plants. But from what we can observe of pre-industrial societies that still exist, a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things, even for other plants. They have always been enormously important to the welfare of peoples, not only for food, but also for clothing, weapons, tools, dyes, medicines, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognize literally hundreds of plants A. there is no clear way to determine the extent of our ancestors’ knowledge of plants B. it is not surprising that early humans had a detailed knowledge of plants C. it is reasonable to assume that our ancestors behaved very much like people in preindustrial societies D. human knowledge of plants is well organized and very detailed 查看答案 更多"{{B}}第二篇{{/B}} Botany, "的相关试题: [单项选择]{{B}}第二篇{{/B}} Botany, the study of plants, occupies a peculiar position in the history of human knowledge. For not many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insights(了解). It is impossible to know today just what our Stone Age ancestors knew about plants. But from what we can observe of pre-industrial societies that still exist, a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things, even for other plants. They have always been enormously important to the welfare of peoples, not only for food, but also for clothing, weapons, tools, dyes, medicines, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognize literally hundreds of plants A. probably had extensive knowledge of plants B. thought there was no need to cultivate crops C. did not enjoy the study of botany D. placed great importance on the ownership of property 查看答案 [单项选择]{{B}}Text 2{{/B}} Botany, the study of plants, occupies a peculiar position in the history of human knowledge. For many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insight. It is impossible to know today just what our Stone Age ancestors knew about plants, but from what we can observe of preindustrial societies that still exist, a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things, even for other plants. The have always been enormously important to the welfare of people, not only for food, but also for clothing, weapons, tools, dyes, medicines, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognized literally hundreds of plants and know A. They probably had extensive knowledge of plants. B. They thought there was no need to cultivate crops. C. They did not enjoy the study of botany. D. They placed great importance on the ownership of property. 查看答案 [填空题]Botany, the study of plants, occupies a peculiar position in the history of human knowledge. We don’t know what our Stone Age ancestors knew about plants, but from what we can observe of reindustrialize societies that still exist, a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things, even for other plants. ______ Tribes living today in the jungle of the Amazon recognize hundreds of plants and know many properties of each. To them botany has no name and is probably not even recognized as a special branch of" knowledge" at all. A. Yet few people will fail to recognize a rose, an apple, or an orchid. B. From then on, humans would increasingly take their living from a few plants. C. They have always been enormously important to the welfare of people, not only for food, but also for clothing, weapons, tools, dyes, medicines, shelter, and many other purposes. 查看答案 [单项选择]来源:考试大-职称英语考试第二篇Study Says Dogs Can Smell Cancer 　　Dogs are known for their sense of smell.They can find missing people and things like bombs and illegal drugs.Now a study suggests that the animal known as man’s best friend can even find bladder(膀胱)cancer. 　　Cancer cells are thought to produce chemicals with unusual odors(气味).Researchers think dogs have the ability to smell these odors,even in very small amounts,in urine(尿).The sense of smell in dogs is thousands of times better than in humans. 　　The study follows reports of cases where,for example,a dog showed great interest in a growth on the let of its owner.The mole(痣)was later found to be skin cancer. 　　Carolyn Willis led a team of researchers at Amersham Hospital in England.They trained different kinds of dogs for the experiment.The study involved urine collected from bladder cancer patients,from people with other diseases and from healthy people. 　　Each dog was tested eight times.In each test there were seven samples f A. 36 bladder cancer patients. B. 144 cancer patients. C. 108 healthy people. D. 144 sick and healthy people. 查看答案 我来回答: 提交 最新试题 ●    [判断题]绝缘操作杆、验电器和测量杆允许使用电压应与设备运行状况相符。 ●    [单选题] 使用中的氧气瓶和乙炔气瓶应( )固定放置，氧气瓶和乙炔气瓶的距离不得小于5m，气瓶的 ●    Modern Drugs Doctors, sixty years ago, could ●    下列哪些属于经税务机关通知申报而拒不申报行为方面的证据（）。 ●    [判断题]某班在开展主变顶作业时发生1名班员未使用安全带高处坠落到地面，经医护人员人员检查，此人只是 ●    [判断题]导线敷设在吊顶或天棚内，可不穿管保护。（ ） 网站地图 我要搜题网  版权所有  ©2024  湘ICP备18016427号   购买搜题卡查看答案 [会员特权] 开通VIP， 查看 全部题目答案 [会员特权] 享免全部广告特权 推荐91天 ¥36.8 ￥80元 31天 ¥20.8 ￥40元 365天 ¥88.8 ￥188元 请选择支付方式 微信支付 支付宝支付 点击支付即表示同意并接受了《购买须知》 立即支付 系统将自动为您注册账号 已有账号登录 找回账号密码 请使用微信扫码支付 订单号： 截图扫码使用小程序[完全免费查看答案] 前往小程序 请不要关闭本页面，支付完成后请点击【支付完成】按钮 支付完成 取消支付 恭喜您，购买搜题卡成功 系统为您生成的账号密码如下： 账号 密码 重要提示：请拍照或截图保存账号密码！ 我要搜题网官网：https://www.woyaosouti.com 我已记住账号密码