生物专业考研，考英语一还是二？

以下不属于中国境内发现的晚期智人阶段的遗址的是（ ）

A.山顶洞人
B.柳江人
C.河套人
D.大荔人

2013年7月1日，新修订的《老年人权益保障法》开始实施。该法明确规定:家庭成员应当关心老年人的精神需求，不得忽视、冷落老年人。与老年人分开居住的家庭成员，应当经常看望或者问候老年人。“常回家看看”写入法律，这对我们的启示是

A.不关爱老人既违反家庭美德，又违反法律
B.和谐的亲情关系应建立在真心关怀与爱护上
C.平常的亲情关系要靠法律来维系，这是道德与法律的无奈
D.法律是道德的底线，这意味着社会上的不敬老现象扩大化了

蛋白质变性时,不受影响的结构是
A. 一级结构 B. 二级结构 C.三级结构 D.四级结构

Text 4 In 1784,five years before he became president of the United States,George Washington,52,was nearly toothless.So he hired a dentist to transplant nine teeth into his jaw–having extracted them from the mouths of his slaves.That’s a far different image from the cherry-tree-chopping George most people remember from their history books.But recently,many historians have begun to focus on the roles slavery played in the lives of the founding generation.They have been spurred in part by DNA evidence made available in 1998,which almost certainly proved Thomas Jefferson had fathered at least one child with his slave Sally Hemings.And only over the past 30 years have scholars examined history from the bottom up.Works of several historians reveal the moral compromises made by the nation’s early leaders and the fragile nature of the country’s infancy.More significantly,they argue that many of the Founding Fathers knew slavery was wrong–and yet most did little to fight it.More than anything,the historians say,the founders were hampered by the culture of their time.While Washington and Jefferson privately expressed distaste for slavery,they also understood that it was part of the political and economic bedrock of the country they helped to create.For one thing,the South could not afford to part with its slaves.Owning slaves was“like having a large bank account,”says Wiencek,author of An Imperfect God:George Washington,His Slaves,and the Creation of America.The southern states would not have signed the Constitution without protections for the“peculiar institution,”including a clause that counted a slave as three fifths of a man for purposes of congressional representation.And the statesmen’s political lives depended on slavery.The three-fifths formula handed Jefferson his narrow victory in the presidential election of 1800 by inflating the votes of the southern states in the Electoral College.Once in office,Jefferson extended slavery with the Louisiana Purchase in 1803;the new land was carved into 13 states,including three slave states.Still,Jefferson freed Hemings’s children–though not Hemings herself or his approximately 150 other slaves.Washington,who had begun to believe that all men were created equal after observing the bravery of the black soldiers during the Revolutionary War,overcame the strong opposition of his relatives to grant his slaves their freedom in his will.Only a decade earlier,such an act would have required legislative approval in Virginia.37.We may infer from the second paragraph that

A.DNA technology has been widely applied to history research.
B.in its early days the U.S.was confronted with delicate situations.
C.historians deliberately made up some stories of Jefferson’s life.
D.political compromises are easily found throughout the