第19题: [单项选择]关于颅骨的发育错误的是 A. 前囟出生时约1.5~2cm B. 前囟1~1.5岁闭合 C. 后囟最迟于出生后6~8个月闭合 D. 颅骨缝约于3~4个月闭合 E. 后囟出生时可以已闭合 参考答案:C
第20题: [单项选择]Living in poverty, John sold for 500 dollars the ______ of his mother's first work which made her famous. A. document B. file C. duplicate D. manuscript 参考答案:D 答案解析:[解析] D项“manuscript手稿,原稿”符合题意。如:When a manuscript has been accepted for publication, it is passed to