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Passage Two Questions 29 to 31 are based on the passage you have just heard.
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期货交易实行保证金制度，保证金比例通常为期货合约价值的1%～5%。( )
中国公民冯某、秦某、许某、严某四人准备出资设立昊天有限责任公司(下称昊天公司)。四人拟出资100万，其中冯某以价值30万元的厂房和价值20万的知识产权出资；秦某出资30万元(现金)；严某出资15万元(现金)；许某出资5万元(现金)。四人拟定了公司章程，约定公司不设董事会、监事会。由秦某担任执行董事，冯某任公司的监事，并且指定秦某办理设立登记事项。秦某同时为其个人投资的长翔有限责任公司(下称长翔公司)的总经理，长翔公司欠伟诚公司货款50万元未还。秦某与伟诚公司达成协议约定，秦某将其在昊天公司的20%的股权质押给伟诚公司。届期，长翔公司未还款，伟诚公司请求秦某履行协议，秦某以“此事尚未与其商量”为由搪塞，伟诚公司遂拟通过诉讼来解决问题。公司成立3年后，一次红利也未分过，目前亏损严重。冯某向秦某提出解散公司，但秦某不同意。冯某决定转让股权，退出公司，但一时未找到受让人。 如果伟诚公司申请法院强制执行秦某在昊天公司中的股权，下列说法中正确的有( )。
数据库的数据语言(DDL)定义数据库的全局逻辑数据结构、局部逻辑数据结构和 【15】 。
Every living thing has what scientists call a biological clock that controls behavior. It tells plants when to 62 flowers and insects when to leave protective cocoon(茧) and fly away. And it tells animals and human beings when to 63 , sleep and seek food. It controls our body temperatures, the 64 of some hormones and even dreams. Events 65 the plant and animal affect its actions. Scientists recently found that a tiny animal called Siberian hamster changes the color of its 66 because of the number of hours of 67 . In shorter days of winter its fur becomes white. The fur becomes gray-brown in longer 68 of daylight in summer. 69 signals control other biological clocks. German scientists found that some internal one seems to order birds to begin their 70 flights two times each year. Birds prevented from flying become 71 when it is time for the trip. 72 they become can again when the time of the flight has ended. A mix of outside and internal events controls some biological clocks；such things as heartbeat and the daily change from sleep to walking take place because of both external and internal signals. Scientists are beginning to learn 73 parts of the brain contain the biologicaI clocks. A researcher at Harvard University. Dr. Martin Moore Ede, said a small group of cells near the front of the brain seemed to control the 74 of some of our actions. Probably there are other cells to control other body activities. He is studying 75 they affect the way we do our work. Most of us have great difficulty if we 76 often change to different work hours. 77 call take many days for a human body to 78 a major change in work hours. Industrial officials should have a better 79 of biological clocks and how they affect workers. He said such an understanding could 80 sickness and accidents at work, and would help increase 81 .
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