题目内容
（请给出正确答案）
A.a single type of multipotent stem cell found in the bone marrow
B.differentiated cells that first developed in the fetal liver, but now reside in the bone marrow
C.division of differentiated cell types while circulating in the blood
D.stem cells that became committed to each specific blood celll type during embryonic development
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更多“The many different cell types …”相关的问题
A、cell proliferation
B、cell differentiation
C、meiosis
D、mitosis
A．implies that many different types of computers
B．implies that many different types of divisions
C．implies that many different types of problems can be handled by the machine
D．implies that many different operators
Why does the professor mention fingerprints？
A．To demonstrate that blood types are different for individuals
B．To explain how most of the blood tests are performed
C．To explain why O blood is considered universal
D．To help students remember the different antigens
A、cell
B、blood
C、white blood cell
D、red blood cell
According to the passage, growing lab meat is technically difficult because _________
A． meat is a tissue not difficult to be made artificially
B． it is too expensive to produce a single pound of lab meat
C． different cell types play different roles in flavors and mouth-feels
D． exact cell structure imitation is not essential to make the lab meat delicious
Passage Four
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 transfused 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.
48. A good title for this passage is______.
A. Getting Blood and Plasma
B. Special Blood and Colors
C. Human Blood Types
D. The Blood Bank of a Hospital
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