1963年,山东郭城县城卫生院改建时,请郭沫若先生题写院名,不久该院接到郭老的回信,全院上下喜出望外,打开一看,信笺上却

您好 1963年按公元纪年法是 二十世纪六十年代 谢谢采纳

《Deterministic nonperiodic flow》
发表在Journal of Atmospheric Sciences.Vol.20 :130—141 link

2010年是平年,1963年也是平年.

解题思路：威胁生物多样性的原因有：栖息地的丧失、人类的滥捕乱杀和外来物种的入侵．其中主要的是栖息地的丧失．

乱砍乱伐森林会破坏生物的栖息地；环境污染会使环境发生巨大变化，导致生物不能再适应环境而死亡；生物入侵，我们知道引进外来物种，一般不引进它的天敌，因此外来物种就会因为缺少天敌，而数量大增，进而与其它生物争夺生存资源，从而影响了其它生物的生存，甚至引起其它生物的死亡，就会破坏生物的多样性．因此秘鲁海岸因石油污染而使1560万只海鸟相继死去．此实例说明生物多样性面临威胁的原因之一是环境污染．
故选：A

点评：
本题考点： 威胁生物多样性的原因．

考点点评： 解答此类题目的关键是熟记威胁生物多样性的原因．

解题思路：据图在1863年到1963年的过程中，浅色个体减少，中间色个体增加，深色个体也减少．自然选择的对象：a．直接对象是生物的变异性状（表现型）；间接对象是相关的基因型；根本对象是与变异性状相对应的基因，即自然选择的实质是环境对变异所对应的基因的选择，因而可以改变种群的基因频率．自然选择的因素：对生物的变异起选择作用的是个体所处的自然环境．自然选择的动力：生存斗争．

A、在实验数据中不能得到深体色和浅体色个体的性别比例；故A错误．
B、由图可知，1863到1963年蝴蝶深、浅体色个体逐渐被淘汰，中间体色个体适应环境，不容易被天敌发现，存活下来；故B正确．
C、进化的基本单位是种群，自然选择使得种群中浅色个体容易生存，相应种群基因频率增加；故C错误．
D、深体色和浅体色类群能相互交配的，进行基因交流，不存在生殖隔离；故D错误．
故选B．

点评：
本题考点： 生物进化与生物多样性的形成；物种的概念与形成．

考点点评： 本题考查自然选择的作用的相关知识，意在考查学生理论联系实际，综合运用所学知识解决自然界和社会生活中的一些生物学问题．

At year 1963, five-year-old Jackson started to reveal his talent in singing and dancing.
During year 1964, Jackson and his four elder brothers started the band "Jackson 5", and he soon became the lead singer.
At the age of 20, Jackson was already a superstar. He achieved accomplishments in singing performance, dancing, and composing, and he was called "the King of Pop".
希望我的回答对你有帮助亲~

1963.(Qiqiesite) had lung cancer,he ignored the advice of doctors and friends began a voyage of his life,after he completed the voyage difficulties.When others thought that this end,he began to challenge the dangerous voyage,the voyage last more difficult,or even nearly killed,(Qiqiesite) also produced a mood of fear and escape,but fortunately eventually overcome ,and in 1967 he welcomed the sound of the people back to the UK,he completed his dream to become the pride of the people of.
括号里是人名：拼音

1963年,我上初三,写了篇作文交.
魏格纳兴奋的说：“这不会是一种巧合吧 ?”
我们现在开设语文、数学、科技、艺术、体育这几门课.

都不值钱，最多10元一个

Michael Jordan was born in 1963 in New York.When he was young,he didn't look like a future superstar.
He was very shy and didn't like to talk to other people.He was also very short.
Michael's road to fame began at the University of North Carolina.He brought an acrobatic style to the
basketball.He used his quickness and strength to reach the basket again and again.He became famous for his
powerful slam dunk.He was given the nickname" Air Jordan".
After college,he was chosen by the Chicago Bulls.Since then he led the Chicago Bulls to six NBA
championships.He once set a record by scoring 63 points in one game.In April 2003 ,when he was 40,he said
goodbye to his game.
答案不唯一

这样理解 1个酶活性单位就是指1min能转化1mmol底物的酶量.酶活性单位不仅是简单用酶量表征,而是需要用能在1min的催化1mmol底物的酶量来表征.假设某酶1min能转化1mmol底物的酶量为5,那它的活性就是5.