第4题: [单项选择]胎头的最大横径是() A. 枕下前囟径 B. 枕额径 C. 枕颏径 D. 双顶径 E. 双颞径 参考答案:D 答案解析:题考查的是胎儿颅骨的各条径线特点。枕下前囟径、枕额径及枕颏径均不是横径。双顶径是胎头的最大横径,足月时平均值约为9.3cm。因此正确答案选D。
第5题: [单项选择]--What a beautiful picture!--It's years _______ a picture as beautiful as this one. A. that I have painted B. since I have painted C. since I painted D. when I painted 参考答案:C 答案解析:[解析] 此句是since引导的从句,主句的谓语动词如用现在完成时,其后接的since,从句一般用过去一般时。故本题答案为C。