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All mammals require sleep; it is an essential part of life. For giraffes, two hours a Line day is enough. For bats, that number is closer to twenty. The average adult human needs between seven and nine hours of sleep every day. Despite these differences, mammals all have one thing in common: If they do not get enough sleep, they can (5) suffer serious mental and physical consequences. The most extensive sleep research has been conducted on people. Through these studies, scientists have identified two broad categories of sleep, which can be further divided into five stages with distinct physiological functions. Taken together, they form a complete sleep cycle. The first four stages are marked by a (30) lack of rapid eye movement (REM). Therefore, they are referred to as non-REM< A. (A) diabetes is linked to obesity B. (B) sufficient sleep is not crucial to good health C. (C) diabetes is a serious physical consequence of poor sleep D. (D) the disorders are probably a result of unbalanced hormone production E. (E) non-REM sleep is more important than REM sleep 查看答案 更多"All mammals require sleep; it is "的相关试题: [单项选择] All mammals require sleep; it is an essential part of life. For giraffes, two hours a Line day is enough. For bats, that number is closer to twenty. The average adult human needs between seven and nine hours of sleep every day. Despite these differences, mammals all have one thing in common: If they do not get enough sleep, they can (5) suffer serious mental and physical consequences. The most extensive sleep research has been conducted on people. Through these studies, scientists have identified two broad categories of sleep, which can be further divided into five stages with distinct physiological functions. Taken together, they form a complete sleep cycle. The first four stages are marked by a (30) lack of rapid eye movement (REM). Therefore, they are referred to as non-REM< A. (A) promoting mammalian sleep research B. (B) documenting the importance of non-REM sleep in hormone regulation C. (C) describing the role of sleep in human behavior and development D. (D) arguing that humans need more sleep to function optimally E. (E) illustrating the importance of REM sleep to brain function 查看答案 [简答题]Nowadays, most universities require students to pay for their education, and the tuition fees have been staying so high that some families cannot afford them. What do you think of the phenomenon Write an essay of about 400 words on the following topic: 查看答案 [填空题]In order to set the system, you should have all passengers get out of the vehicle. 查看答案 [填空题]In the United States, the authorities require all financial transactions of over ______ to be reported by way of precaution against money laundering. 查看答案 [简答题]Some high schools require all students to wear school uniforms.Other high schools permit students to decide what to wear to school.Which of these two school policies do you think is better Use specific reasons and examples to support your opinion. 查看答案 [单项选择] All living cells on earth require moisture for their metabolism. Cereal grains when brought in from the field, although they may appear to be dry, may contain 20 per cent of moisture or more. If they are stored in a bin thus, there is sufficient moisture in them to support several varieties of insects. These insects will, therefore, live and breed and, as they grow and eat the grain, it provides them with biological energy for their life processes. This energy will, just as in man, become manifest as heat. Since the bulk of the grain acts as an insulator, the temperature surrounding the colony of insects will rise so that, not only is part of the grain spoiled by the direct attack of the insects but more may be damaged by the heat. Sometimes, the temperature may even rise to the point where the stored grain catches fire. For safe storage, grain must be dried until its moisture content is 13 per cent or less. Traditional arts of food preservation took advantage of thi A. consuming all the grain themselves B. generating heat and raising the surrounding temperature C. increasing the moisture content in the grain D. attacking each other for more grain 查看答案 [单项选择]A. Robert survived the plane crash. B. All the passengers were killed in the plane crash. C. Robert was killed in the air crash. D. Robert is a wonder-working person. 查看答案 [单项选择] 1 All animals must rest, but do they really sleep as we know it The answer to this question seems obvious. If an animal regularly stops its activities and stays quiet and un moving-if it looks as though it is sleeping—then why not simply assume that it is in fact sleeping But how can observers be sure that an animal is sleeping They can watch the animal and notice whether its eyes are open or closed, whether it is active or lying quietly, and whether it responds to light or sound. These actors are im portant clues, but they often are not enough. Horses and cows, for example, rarely close their eyes, and fish and snakes cannot close them. Yet this does not necessarily mean that they do not sleep. Have you ever seen a cat dozing with an eye partly open Even humans have occasionally been observed to sleep with one or both eyes partially open. Animals do not necessarily lie down to sleep either. Elephants, for example, often sleep standi A. spend some time resting B. close their eyes when sleeping C. are good sleepers D. are poor sleepers 查看答案 [单项选择]All animals must rest, but do they really sleep as we know it The answer to this question seems obvious. If an animal regularly stops its activities and stays quiet and unmoving—if it looks as though it is sleeping—then why not simply assume that it is in fact sleeping But how can observers be sure that an animal is sleeping They can watch the animal and notice whether its eyes are open or closed, whether it is active or lying quietly, and whether it responds to light or sound. These factors are important clues, but they often are not enough. Horses and cows, for example, rarely close their eyes, and fish and snakes cannot close them. Yet this does not necessarily mean that they do not sleep. Have you ever seen a cat dozing with an eye partly open Even humans have occasionally been observed to sleep with one or both eyes partially open. Animals do not necessarily lie down to sleep either. Elephants, for example, often sleep standing up, with their tusks resting in the fork of a tr A. such as turtles and snakes cannot close their eyes B. cannot be studied with an EEC C. do not sleep in the true sense of the word D. do not need to rest 查看答案 我来回答: 提交 最新试题 ●    [单选题]在制药行业中，将新药推向市场的平均资本成本约为___美元，比1990年代增加了70％以上。 ●    [判断题]当事人对行政处罚决定不服提起行政诉讼的,行政处罚停止执行。 ●    [判断题]贷款人不必设立独立的责任部门或岗位，负责流动资金贷款发放和支付审核。（ ） ●    [多选题]低分压控后路不通时会造成(　　)。 ●    [单选题]《关于加强客运站车客运组织工作的通知》（客管电〔2019〕143号）规定，始发动车组列车（ ●    [单选题]车门切除指示灯在每个客室侧门内侧上方均设有( ）指示灯；车门操作机械隔离时，指示 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