汉朝张衡已经发明了地震仪，现代的人也制造出了许多地震预警监测方面的仪器，但是远没有达到精确预测地震的目的。这是因为（）①对地震的认识受到人的认识水平的制约和限制②对地震活动规律的探究活动是认识发展的动力③地壳运动规律的暴露与展现需要一个长期的过程④对地震的预测取决于地震工作者的科学素养和能力

A、①④

B、②③

C、②④

D、①③

Eastern Quakes Can Trigger Big ShakesIn the first week of November 2011 ， people in central Oklahoma experienced more than two dozen earthquakes. The largest, a magnitude (量）5.6 quake, shook thousands of fans in a college football stadium, caused cracks in a few buildings and scared many people who had never felt a quake before. Oklahoma is not an area of the country famous for its quakes. If you watch the news on TV, you see reports about all sorts of natural disasters. But the most dangerous type of natural disaster, and also the most unpredictable, is the earthquake.Researchers at the US Geological Survey ( USGS) estimate that several million earthquakes occur globally each year. That may sound scary, but people don’t feel many of them because they happen in remote and unpopulated regions. Many quakes happen under the ocean, and others have a very small magnitude.Scientists know about small, remote quakes only because of very sensitive electronic devices called seismometers (地震仪）.These devices detect and measure the size of ground vibrations (震颤）produced by earthquakes. Altogether, USGS researchers use seismometers to identify and locate about 20, 000 earthquakes each year.Although earthquakes can happen anywhere in the world, really big quakes occur only in certain areas. The largest ones register a magnitude 8 or higher and happen, on average, only once each year. Such big ones typically occur along the edges of Earth’s tectonic plates (构造板块）Tectonic plates are huge pieces of Earth’s crust (夕卜壳），sometimes many kilometers thick. Often, edges of these plates temporarily lock together. When plates push and scrape (擦）past each other earthquakes occur. On average, tectonic plates move very slowly — about the same speed as your fingernails grow.But sometimes earthquakes rumble (轰轰作响）through portions of the landscape far from a plate’s edges. Although less expected, these “mid-plate” small earthquakes can do substantial damage. Some of the biggest known examples hit the eastern half of the United States two centuries ago. Today, scientists are still puzzling over why the quakes occurred and when similar ones might occur.Whenever tectonic plates move, earthquakes happen. A Right B Wrong C Not mentioned

付款人在进行付款时无（）

A.形式审查义务

B.实质审查义务

C.附带审查义务

D.票据外有关事项的审查义务

根据《公司法》的规定,有限责任公司下列人员中,可以提议召开股东会临时会议的是()。
A.总经理B.人数过半数的股东C.监事会主席D.人数为半数的董事

关于股份有限公司中的监事会，下列说法错误的是()

A.监事会负责提议聘请或更换外部审计机构B.监事会主席和副主席由全体监事过半数选举产生C.监事会中的职工代表的比例不得低于三分之一D.监事会应至少每6个月召开一次会议

三北精神的科学内涵

阿里巴巴提供了“企业名称认证”“企业身份认证”不同种类的认证,可以根据自身的