A.2~4 B.4~6 C.6~8 D.8~10
A.清點(diǎn)埋植劑的根數(shù) B.測(cè)量每根皮埋劑的長(zhǎng)度 C.核對(duì)每根皮埋劑的長(zhǎng)度 D.記錄埋植劑的外觀和有無缺損
A.1~3 B.3~6 C.6~9 D.9~12