在人类唾液中与龋病发病关系最密切的抗体IgA。
参考答案:错
Our teacher did what she could ______us with English.
A.help
B.helped
C.helping
D.to help
成年妇女的卵巢大约()
A.4×3×1cm3
B.4×2×1cm3
C.3×2×1cm3
D.4×4×2cm3
E.5×4×3cm3