一类与种属无关的存在人、动物和微生物之间的共同抗原是（）。

A.自身抗原

B.同种异型抗原

C.超抗原

D.独特型抗原

E.异嗜性抗原

Eric nearly always wins the science award.That’s because his projects are ___.

A．extremely presented well

B．well presented extremely

C．presented well extremely

D．extremely well presented