下图为实验室制取氢气的发生装置。若液面刚好不与锌粒接触而又无酸液可加,要得到氢气,可从长颈漏斗中加入的适量试剂是4^8h(x'W2J2}7W
①食盐水 ②硫酸钠溶液 ③氯化钡溶液 ④碳酸钠溶液请选择DCBA(U6W9T,}1n'j4|9?*r:]4B9b'A;Q4^8h(x'W2J2}7W
4^8h(x'W2J2}7W
A.①②③4^8h(x'W2J2}7W
B.①②④4^8h(x'W2J2}7W
C.②③④4^8h(x'W2J2}7W
D.①③④4^8h(x'W2J2}7W