全部为细胞牙骨质的情况可见于()
A.近釉质牙本质界的1/3
B.近釉质牙本质界的2/3
C.近根尖的2/3
D.近根尖的1/3
E.根分叉区
参考答案:D
—Peter can play _______ volleyball. What about you?
—I can play _______ drums.
A./; /
B./; the
C.the; the
D.the; /
称“后天之本”的是()
A.心
B.肝
C.脾
D.肺
E.肾