[判断题]如果系统受扰动后偏离了原工作状态,扰动消失后,系统能自动恢复到原来的工作状态,这样的系统是(渐进)稳定的系统.
[阅读理解]Sleepless nights don’t just ruin your mood the next day ― they could also damage your waistline. According to new research in the August issue of the American Journal of Clinical Nutrition, sleep deprivation can cause people to pack on extra pounds.Researchers at the New York Obesity Nutrition Research Centre at St. Luke’s-Roosevelt Hospital found that sleep-deprived people seem to burn the same number of calories as the well-rested, but they consume about 300 more calories a day. Given that it takes just 3,500 calories to add a pound to your body, those calories can quickly turn into extra weight.But there are several other reasons that sleep loss could lead to weight gain, says sleep disorder specialist Michael Breus. When we get too little shut-eye, our metabolism(新陈代谢)slows down to conserve energy. That slowdown triggers the release of the hormone cortisol (荷尔蒙皮质醇), which increases appetite. Your body thinks it needs more energy, so it asks for more food.In a vicious cycle, sleep loss also causes our bodies to release more ghrelin(饥饿激素), another hormone that signals hunger working in the normal way, your body wants more food and lacks the sensitivity to know when to stop eating. Not to mention that being awake more hours gives you more time to snack.“The later you’re up at night, the greater the likelihood that your’re going to eat,” Breus says, and “you’re more likely to eat high-fat, high-carb foods.”One other contributing factor to such weight gain is that the body burns the most calories during REM sleep, a deeply restful phase. Less sleep means less time in REM.For optimal health, experts say you should try to get 7.5 hours of sleep a night. If you have trouble sleeping, stick to a nightly routine, exercise during the day, banish worries to a journal, and keep pre-bedtime activities relaxing.(1). This passage is mainly about ______. A、 the influence of sleep loss on weight B、 The effect of sleep deprivation on mood C、 the release of the hormone cortisol D、 the implications of a new research finding(2). Sleep-deprived people consume more calories, which will ______. A、 make them energetic B、 turn into extra pounds C、 damage their mood D、 cause them to feel sleepy(3). According to Michael Breus, sleep loss can ______. A、 decrease people’s appetite B、 slow down energy conservation C、 trigger the need for more food D、 lead to a vicious cycle(4). The word “optimal” in the last paragraph is closest in meaning to ______. A、 best B、 positive C、 optional D、 appropriate(5). To attack sleep troubles, you can ______. A、 exercise regularly at night B、 do more pre-bedtime activities C、 keep a journal at night D、 follow a set routine every night
[问答题]加强现场管理的意义是什么
[单选题]在( )上毛泽东思想被确立为党的指导思想. A、 党的七大 B、 党的八大 C、 党的五大 D、 党的七届二中全会
[单选题]日本经济之所以能在“战后”一片废墟上迅速发展起来,起主导和关键作用的是( ).a.形成了自己独特的企业文化b.先进的社会制度c.进行了企业流程再造d.充分利用企业战略管理
[计算题]将下列函数写成较简单函数的复合形式 ⑴y= e√x^2++1 ⑵y=cos sin2 x3
[单选题]属医生权利的是 A、 限制患者自主权利以达到对患者应尽的责任 B、 医生用所掌握的医学知识为患者服务 C、 医生向患者说明病情等有关医疗活动 D、 主动宣传普及医药卫生知识 E、 医生为患者保守秘密
[单选题]肝功能严重障碍诱发DIC与下列哪一过程无关A、 抗凝血酶-Ⅲ生成减少 B、 血小板生成减少 C、 清除凝血因子Ⅸa、Ⅹa、Ⅺa的作用减弱 D、 组织因子释放增多 E、 解毒功能障碍
[单选题]教育实验中,具有明显重复性的是( ).(A)确认性实验(B)探索性实验(C)验证性实验(D)实验室实验
[单选题]考试替考属严重违纪行为,学院对此的处分决定是 A. 取消考试成绩 B. 勒令退学或开除学籍 C. 严重警告
[单选题]在732K时反应NH4Cl(s) = NH3(g) + HCl(g)的△rGmΘ为-20.8kJ. mol-1,△rHmΘ为154kJ·mol-1,则反应的△rSmΘ为: ( ) A、 239J·K-1·mol-1 B、 0.239J·K-1·mol-1 C、 82J·K-1·mol-1 D、 0.182J·K-1·mol-1
[单选题]地面装修的类型不包括下列哪种( ). A、整体 B、 木楼板 C、铺贴 D、涂料
[单选题]设配对资料的变量值为x1和x2,则配对资料的秩和检验( )A、分别按x1和x2从小到大编秩B、把x1和x2综合按绝对值从小到大编秩C、把x1和x2综合按绝对值从小到大编秩D、把x1和x2的差数按绝对值从小到大编秩
[单选题]现存最早的丛帖是( ) A、 《大观帖》 B、 《宝晋斋法帖》 C、 《淳化阁帖》 ( )
[问答题]y=xe^x2
[单选题]当梁腹板高厚比h0/tw≤80√235/fy时,对有局部压应力时的梁,腹板应( ) A、 可不布置横向加劲加劲肋 B、 应根据构造设横向加劲肋 C、 应按计算设横向加劲肋 D、 应按计算设纵向加劲肋
[单选题]长为1m的悬臂梁,在自由受一集中力P=20KN的作用,材料许用应力[σ]=140MPa,试在下列三种截面形状情况下,比较所耗材料用量:(1)工字钢,(2)高宽比h/b=2的矩形,(3)圆形. A、1 >2>3 B、2>3>1 C、3>2>1 D、3>1>2
[单选题]鸡传染性支气管炎病原的特点是( )(A)属疱疹病毒,在鸡胚中繁殖后在绒尿膜上产生痘斑(B)血清型众多,型与型之间的交叉保护力低(C)病毒可分为A、C两个型,我国以A型分离株较多(D)属痘病毒、血清型很少
[问答题]简述影响混凝土收缩的因素.
[单选题]printf函数中用到格式符.%4s.,其中数字4表示输出的字符串站用4列.如果字符串长度大于4,则按原字符长从左向右全部输出;如果字符串长度小于4,则输出方式为( ) A. 从左起输出该字符串,右补空格 B. 按原字符长从左向右全部输出 C. 右对齐输出该字符,左补空格 D. 输出错误信息
[单选题]《小山乐府》的作者是( ). A、 乔吉 B、 张养浩 C、 刘时中 D、 张可久