{{B}}Singing Alarms Could Save the
Blind{{/B}} If you cannot see, you may not be able to find your way out of a burning building -- and that could be fatal. A company in Leeds could change all that{{U}} (51) {{/U}}directional sound alarms capable of guiding you to the exit. Sound Alert, a company{{U}} (52) {{/U}}the University of Leeds, is installing the alarms in a residential home for{{U}} (53) {{/U}}people in Sommerset and a resource centre for the blind in Cumbria. {{U}} (54) {{/U}} produce a wide range of frequencies that enable the brain to determine where the{{U}} (55) {{/U}}is coming from. Deborah Withington of Sound Alert says that the alarms use most of the frequencies that can be{{U}} (56) {{/U}} by humans. " A. watched B. produced C. learnt D. heard [简答题]中医阴阳学说的基本内容是什么
[单选题]每侧升降舵有三个动力控制作动器(PCA):
A.液压来自左、中央液压系统 B.液压来自左、右液压系统 C.液压来自右、中央液压系统 D.液压分别来自左、右、中央液压系统 [单项选择]一大群行为亢进的,并且日常饮食中包括大量含有添加剂的食物的儿童被研究者观测用于评价他们是否存在行为问题。然后让这些儿童吃几个星期的含较少添加剂的食物,接下来再对他们进行观测。起初有接近60%的儿童有行为问题,改变了他们的饮食后,仅有30%的儿童有行为问题。基于这些数据,我们可以推出食物添加剂有助于引起行为亢进的儿童行为问题。
上面引用的证据不能证明上面的结论,因为()。 A. 没有证据显示行为问题的减少与食物添加剂摄入量的减小成比例。 B. 因为仅对那些改吃含较少添加剂食物的儿童进行了研究,所以我们无法知道若不改变饮食会出现什么样的变化。 C. 因为被研究的群体的大小没有精确地给出,所以改变饮食后,我们无法确定究竟有多少个儿童有行为问题。 D. 没有出示有些儿童的行为不受添加剂影响的证据。 [简答题]运规规定:机车一次整备续行距离和周期要根据( )、( )、( )及地域温差、( )、滤网状态等因素,科学合理安排。
[多选题]机械本质安全技术措施是通过改变机器设计或工作性质来消除危险或者减小与危险相关的风险的保护措施。下列关于本质安全技术措施的方法中,属于本质安全技术的是( )
A.设计安全的控制系统 B.采用限制机械应力 C.采用固定式保护装置 D.设计安全的传动系统 E.设计安全标志 [单项选择]阴痒一般与以下哪种病同时并见()
A. 阴疮 B. 阴吹 C. 带下症 D. 癥瘕 E. 阴挺 [单项选择]As people continue to grow and age, our body systems continue to change. At a certain point in your life your body systems will begin to weaken. Your joints may become stiff. It may become more difficult for you to see and hear. The slow change of ageing causes our bodies to lose some of their ability to bounce back form disease and injury. In order to live longer, we have always tried to slow or stop this process that leads us toward the end of our lives.
Many factors contribute to your health. A well-balanced diet plays an important role. The amount and type of exercise you get is another factor. Your living environment and the amount of stress you are under is yet another. But scientists studying senescence (衰老)want to know: Why do people grow old They hope that by examining the ageing process on a cellular level medical science may be able to extend the length of life. There is nothing to be afraid of as old age approaches. Many consider the later portions of life to be A. Right B. Wrong C. Not mentioned [单项选择]相对而言,机械价格信息中对于工程计价更为重要的是()。
A. 设备市场价格信息 B. 设备租赁市场价格信息 C. 设备回购市场价格信息 D. 设备出售市场价格信息 [单选题](),应当严肃认真、实事求是,遵循及时、准确、详实的原则,不得弄虚作假、隐情不报或者误报、瞒报、延报。
A.A.人员在队统计 B.人员外出统计 C.事故报告统计 D.器材损坏统计 [单项选择]在委托代理法律关系中,如果因为授权不明确而给第三人造成损失,( )。
A. 由被代理人独自承担责任 B. 由代理人独自承担责任 C. 由被代理人和代理人按照约定各自承担赔偿责任 D. 被代理人要向第三人承担责任,代理人承担连带责任 [多项选择]根据我国现行规定,资本公积金包括( )。
A. 任意盈余公积金 B. 股本溢价 C. 拨款转入 D. 接受现金捐赠 E. 未分配利润 [单选题]多旋翼飞行器为什么一般相对的桨旋转方向是不一样的
A.效率更高 B.产生更大升力 C.抵消反扭矩 [单选题]未装备LKJ的动车组列车改按隔离模式进站停车。动车组以外的列车按LKJ(GYK)方式运行,速度不超过()km/h。
A.20 B.30 C.40 D.50 我来回答: 提交
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