12月份的新疆地区，拱顶油罐间输转汽油的定额输转损耗率为（）。（A）0.15% （B

在生产力相对落后的时代，人口的增加意味着人类生产力的增长，而今天，世界70亿人口的现状却给地球的经济资源环境带来巨大压力。这一变化体现了 [ ]

A．矛盾具有特殊性

B．质变是量变的必然结果

C．新事物的发展道路是曲折的

D．按客观规律办事，才能取得成功

两个连在一起的皮带轮，大轮直径是3分米，小轮直径是1分米2厘米，大轮转1周，小轮要转（    ）周。

To learn an instrument such as the violin or accordion（手风琴）takes years. The job opportunities for musicians are scarce and competition is fierce. Then why are more people than ever before paying a lot of good cash to get their children the best music teaching they can afford?

The secret lies in the influence of music on the whole person. It has been found that learning a musical instrument actually increases a person’s IQ over time. Different instruments and different trypes of music have varying effect, with classical music and the string family coming out on top, potentially increasing you IQ by up to 12 points!

When is a good time to start learning music? Experts have found that even the fetus（胎儿）can benefit from listening to classical music. Surround yourself and your family with good music from the first. The Suzuki Piano Method teaches children from the age of 3 years piano, with two lessons per week. From preschool, children can learn to read music and play from sheet music. Progress in learning your instrument is directly proportional（成比例的）to the amount of practicing.

Is there such a thing as an unmusical child? Shinichi Suzuki proposes that music is the native home language of all human beings and therefore nobody can be “unmusical”. Of course there are exceptional talents, compared to which others may seem to be slower learners.

Is there any benefit for adults in starting an instrument? Apart from the purely relaxing aspect, yes. Learning an instrument can earn even adults additional IQ points, and as an added benefit in improves your health by reducing your stress levels. Your social life may benefit too, if you are prepared to come out of your box and join occasions such as Ceilidhs (musical get-togethers) or arrange house concerts. It has been established that people who play instruments tend to be more emotionally balanced and more patient with themselves, others and life in general.

So go ahead, sign up for that amateur orchestra, dust off your old trombone（长号）or take your first real six-string down from the attic（阁楼）; get out there and play!

小题1:Playing which of the following musical instruments can help increase a person’s IQ most?

A．The piano

B．The violin

C．The trombone

D．The accordion小题2:According to Shinichi Suzuki,             .

A．The progress in learning an instrument depends on natural gifts

B．It is too late for an adult to start an instrument

C．Every child has a natural talent for music.

D．All people can understand and read music.小题3:What can be inferred from the text?

A．Music can balance our life.

B．Music can improve our living conditions.

C．Playing instruments can make adults keep their IQ points.

D．Playing instruments can help us get along well with others.小题4:By writing the text, the author mainly wants to        .

A．persuade us to send our children to music schools

B．express his great interest in musical instruments

C．tell us the importance of Music in Development

D．invite us to attend Ceilidhs

可转换公司债券的回售条件一般是（）。

A．公司股价在一段时间内连续偏离转换价格 

B．公司股价在一段时间内连续在转换价格左右小幅波动 

C．公司股价在一段时间内连续低于转换价格达到一定幅度 

D．公司股价在一段时间内连续高于转换价格达到一定幅度

环境科学的任务？