A.鼻腭神經(jīng)和腭前神經(jīng) B.腭前神經(jīng)和上牙槽前神經(jīng) C.鼻腭神經(jīng)和上牙槽前神經(jīng) D.腭前神經(jīng)和眶下神經(jīng) E.眶下神經(jīng)和上牙槽前神經(jīng)
A.翼外肌 B.翼內(nèi)肌 C.顳肌 D.咬肌 E.咽上縮肌
A.預(yù)期現(xiàn)患率高,所需樣本量大 B.在計(jì)算樣本量的常用公式中,當(dāng)容許誤差d=0.1p時(shí),K=400 C.在計(jì)算樣本量的常用公式中,當(dāng)容許誤差d=0.2p時(shí),K=178 D.調(diào)查對(duì)象變異大,所需樣本量小 E.對(duì)調(diào)查的精確度要求高,所需的樣本量小