55._________A.. sizeB. shapeC. tissueD. cell

The four blood types are【C1】______as A, B, AB, and O. Blood type A【C2】______red blood cell

【B16】______A．skinB．muscleC．organD．tissue

The geneticists extracted tissue from several different locations in each mummy because___

回答（55）题 查看材料A.sizeB.shapeC.tissueD.cell

The production of these cancerous cells______the production of normal white blood cells.A．

The production of these cancerous cells______the production 6f normal white blood cells.A．