工作细胞(working cell)
工作细胞(working cell)
工作细胞(working cell)
第1题
A、错误
B、正确
第2题
第4题
A hematopoietic stem cell is defined as
A.a cell with extensive self-renewal and proliferative potential
B.a cell only to produce daughter cells with identical characteristics
C.a cell with the capacity to differentiate into the progenitors of all the blood cell lineages
D.a cell With the capacity to produce some hematopoietic growth factors such as SCF,GM-CSFs,et.a1.
E.a cell with the capacity to express some specific surface antigens such as CD34
第6题
Whats the position of Yellowstone on cell phone use?
A.Supportive.
B.Neutral.
C.Negative.
D.Doubtful.
第7题
A、to
B、into
C、off
D、of
第8题
According to the passage, cell phones were launched______.
A.in the late 1970s
B.between 1955 and 1960
C.in the late 1955s
D.in the early 1990s
第9题
A、肺泡壁工型细胞分泌的一种活性物质
B、肺泡壁Ⅱ型细胞分泌的一种活性物质
C、降低肺泡内壁的表面张力防止肺萎缩
D、降低肺泡内壁的表面张力防止肺扩张
E、增强肺泡内壁的表面张力防止肺扩张
第10题
A.viruses are known to cause cancer in animals
B.at present, human cancer is not believed to be contagious (传染的)
C.there are many known causes for the transformation of a normal cell to a cancer cell
D.results of experiments on plants and animals do not vary greatly from species tn species
第11题
A.Dolly
B.Molly
C.Folly