题目信息
Dr. Tonegawa won the Nobel Prize for discovering how the body can constantly change its genes to fashion a seeming unlimited number of antibodies, each specifically targeted at an invading microbe or foreign substance.
A:seeming unlimited number of antibodies, each specifically targeted at
B:seeming unlimited number of antibodies, each targeted specifically to
C:seeming unlimited number of antibodies, all specifically targeted at
D:seemingly unlimited number of antibodies, all of them targeted specifically to
E:seemingly unlimited number of antibodies, each targeted specifically at
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正确答案：
E:seemingly unlimited number of antibodies, each targeted specifically at
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