全口义齿基托与唾液或粘膜与唾液之间产生的吸力称为

按照2006年7月中国证监会公布的《证券公司风险控制指标管理办法》的规定,证券公司从事自营业务,持有一种权益类证券的成本不得超过净资本的( )

进行套利时,必须坚持同时进出,也就是开仓时同时买入卖出,平仓时也要同时卖出买入。

甲公司2013年利润总额为800万元,当年实际分配并发放给职工的工资为300万元,拨付的工会经费是5万元,发生的职工福利费支出是50万元,假定甲公司无其他纳税调整项目,企业所得税税率为25%,则甲公司2013年应交所得税为( )万元。

根据以下资料，回答以下题。 　　Can animals be made to work for us? Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings.
　　They point out that at a circus, for example, we may see elephants, monkeys, dogs and other animals doing quite skillful things．Perhaps you have seen them on the television or in a film．If you watch closely, you may notice that the trainer always gives the animal a piece of candy or a piece of fruit as a reward．The scientists say that many different animals may be trained to do a number of simple jobs if they know they will get a reward for doing them.
　　Of course, as we know, dogs can be used to guard a house, and soldiers in both old and modem times have used geese to give warning by making a lot of noise when a stranger or an enemy comes near．But it may be possible to train animals to work in factories．In Russia, for example, pigeons which are birds with good eyesight, are being used to watch out for faults in small steel balls that are being made in one factory．When the pigeon sees a ball which looks different from others, it touches a steel plate with its beak．This turns on a light to warn people in the factory．At the same time a few seeds are given as a reward．It takes three to five weeks to train a pigeon to do this and one pigeon can inspect 3 000 to 4 000 balls an hour.
　　Apes have been used in America in helping to make cars, and scientists believe that these large monkeys may be one day gather crops and even drive trains.