青岛理工大学专升本的土木工程和工程管理分别考什...

You have been badly injured in a car accident．It is necessary to give you a blood transfusion because you lost a great deal of blood in the accident．However,special care must be taken in selecting new blood for you．If the blood is too different from your own,the transfusion could kill you.
There are four basic types of blood;A,B,AB and O．A simple test can indicate a person's blood type．Everybody is born with one of these four types of blood．Blood type,like hair color and height,is inherited from parents.
Because of substances contained in each type,the four groups must be trans fused carefully．Basically,A and B cannot be mixed．A and B cannot receive AB,but AB may receive A or B．O can give to any other group,hence it is often called the universal donor．For the opposite reason,AB sometimes called the universal recipient．However,because so many reactions can occur in transfusions,patients usually receive only salt or plasma until their blood can be matched as exactly as possible in the blood bank of a hospital．In this way,it is possible to avoid any bad reactions to the transfusion.
There is a relationship between your blood type and your nationality．Among Europeans and people of European ancestry,about 42 percent have type A while 45 percent have type O．The rarest is type AB．Other races have different percentages．For example,some American Indian groups have nearly 100 percent type O.

The word“hence”in line 10 means__.

A.always
B.often
C.therefore
D.seldom

甲有二子乙和丙。乙离家出走，经法院依法判决宣告死亡。后甲病故，遗产由丙继承。甲病故3年后，乙返回并要求继承甲的遗产，请判断下列哪些说法是正确的?( ）

A.乙、丙均为甲的继承人，理由是甲与乙、丙之间是父子关系
B.只有丙为继承人，理由是继承开始后，乙被宣告死亡
C.乙无权要求继承甲的遗产，理由是遗产已由丙继承，该继承行为已经发生法律效力
D.乙有权继承甲的遗产，理由是乙为甲的继承人，且提出权利请求未超过诉讼时效

享誉世界的卢浮宫是___________的艺术博物馆。（ ）

A.美国
B.英国
C.德国
D.法国

遗传素质是能力发展的（ ）

A.动力系统
B.自然前提
C.心理基础
D.核心成分