题目

Mr. Guo is a teacher from Xi'an. He asked his students to hand in their homework through a QR code（二维码）. “We spent an hour or two in class learning how to generate（使产生）the codes，and in the end everything gets easier. said Guo. When students finish the homework，they keep it on WeChat（微信）. Then，each student makes his own QR code and gives it to me. So I can check their work everywhere using my computer or mobile phone. ”The QR codes can be sent to Mr. Guo by email，QQ and WeChat. When Guo scans（扫描）his students' QR codes，their homework appears on h 9.03×1023个氨分子含________摩氮原子，________摩氢原子，________摩质子，________个电子．