單項(xiàng)選擇題根據(jù)胎兒身長(zhǎng)判定妊娠周數(shù)恰當(dāng)?shù)氖牵ǎ?/strong>

A.妊娠20周末,胎兒身長(zhǎng)為25cm
B.妊娠24周末,胎兒身長(zhǎng)為32cm
C.妊娠28周末,胎兒身長(zhǎng)為31cm
D.妊娠32周末,胎兒身長(zhǎng)為33cm
E.妊娠40周末,胎兒身長(zhǎng)為45cm