题型:解答题 —Look! It ________ be the new woman manager. —It ________ be her. She has just left for Shanghai. [ ]A. can; mustn't B. must; can't C. must; mustn't D. can't; must 查看答案
题型:解答题 (5分)写出下列反应方程式,并在括号内注明基本反应类型。⑴ 磷的燃烧 __________________________________________ ( )⑵ 用稀盐酸除铁锈____________________________________ ( )(3)经查阅资料得知,乙炔(C2H2)气体可用水和CaC2固体反应制取。写出该反应的化学方程式 查看答案