A.額顳葉B.后頭部C.頂葉D.枕葉E.中線部位
A.1~2個(gè)月B.3~4個(gè)月C.7~8個(gè)月D.9~10個(gè)月E.1歲
A.2~3個(gè)月B.6~7個(gè)月C.9~10個(gè)月D.1歲E.1~2歲