A.18個(gè) B.20個(gè) C.21個(gè) D.23個(gè)
A.25℃ B.30℃ C.35℃ D.40℃
A.0.3mT(7Gs) B.0.7mT(7Gs) C.0.5mT(7Gs) D.10mT(7Gs)