题目

From the moment the iron bird landed in the roaring noise of Logan Airport with its wings proudly spread, my wings withered quietly in this unfamiliar country.“I think... I don’t know... I just want to say ...” My voice _______ into the noise of the grand dining hall of Deerfield Academy, _______ listening. Like most of the Asian students, I found myself able to ___________ my head, only in math class. All this made me puzzled and _______ .“Helen, what is your name in Chinese?” Rosie asked me one morning as I_______ my backpack onto the seat next to her.“Gao Yuxin”, I_______ clea1．在实验室制取下列气体时，作反应容器的试管口及用排空气法收集气体的集气瓶口都必须向上的是（　　）A．用高锰酸钾制取氧气B．用氯酸钾和二氧化锰制取氧气C．用锌和稀硫酸制取氢气D．用石灰石和稀盐酸制取二氧化碳气体