参与胶原蛋白合成的维生素是A.维生素A B.维生素B1 C.维生素pp D.维生素C 发布时间:2017-06-22 09:16 │ 来源:www.tikuol.com 题型:单项选择题 问题: 参与胶原蛋白合成的维生素是A.维生素AB.维生素B1C.维生素ppD.维生素CE.维生素K
题型:单项选择题 People ______ that vertical flight transports would carry millions of passengers as do the airliners of todayA. convinced B. anticipated C. resolved D. assured 查看答案