纵隔生殖细胞瘤从胚胎发育上来源于何处()A.第3、4腮弓 B.胎儿尿生殖嵴 C.胸腺 发布时间:2017-07-12 16:03 │ 来源:www.tikuol.com 题型:单项选择题 问题: 纵隔生殖细胞瘤从胚胎发育上来源于何处()A.第3、4腮弓B.胎儿尿生殖嵴C.胸腺干细胞D.迷走原始生殖细胞E.卵黄囊
题型:单项选择题 用括号内所给单词的正确形式填空。1. The famous_________(predict) will come true next year.2. We will have_________ (little) pollution than before.3. They want to know if he_________(arrive) in Yantai in 2 days. 4. There are many people ___________(have) a rest.5. He_________(be) 17 years old next year. 查看答案