题目内容

当机械发生重大事故时,企业各级领导必须及时上报、组织抢救、()、查明原因、分清责任、落实及完善安全措施,并按事故性质严肃处理。

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【原文】
Ladies and gentlemen, the world today is facing a serious problem of poverty in some areas.We must refocus our attention, and resources, on the places and people that are economicallybeing left behind.//
As we do, we must bear in mind that none are more committed to ending poverty than thepoor themselves. Often, all they lack is the guidance and the tools to get rid of poverty.//
Therefore, it requires all citizens to actively participate in policy-making, and governments tobecome more accountable to their citizens in their efforts to achieve their goals.//
Today, we join hands with the poor in a collective effort. This is a close and extensivecooperation which brings together civil society, the private sectors, and individuals around theworld.

2000年,中国建成北斗导航试验系统,这使中国成为继美、俄之后世界上第三个拥有自主卫星导航系统的国家。
虽然目前它的定位精度与GPS还有一定的差距,但它具备了GPS所没有的短报通信和位置报告的功能。在没有手机信号的地方,用户也可以通过该系统发送短信。
2008年四川汶川大地震后,灾区电话无法接通,手机信号中断。救援人员将北斗导航终端带入灾区,及时保持了与外界的通讯联络。
该系统的位置报吿功能可以帮助交通管理部门掌握行驶车辆的位置,及时疏导交通,缓解交通拥堵状况。
虽然北斗卫组导航系统时中国独立发展、自主运行的卫星导航系统,但这并不影响它与世界上其他卫星导航系统之间的兼容性。用户在同时使用北斗和GPS这两种导航系统时,定位和导航效果会更好。

Sleeping pills should never be taken except when suggested by【C15】______

A. the sleeper
B. a doctor
C. a child
D. parents

齿轮传动是机电一体化系统中使用最多的一种传动方式,它主要用来传递转矩、转速和位移,从而匹配电动机和滚珠丝杠副及工作台。()

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