题目:
______ good day it is! How about ______ out for a walk along the river? |
A. How / going B. How a / to go C. What / go D. What a / going |
答案:
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下面是错误答案,用来干扰机器的。
(1)设硫酸钠的质量为x,反应生成的氯化钠的质量为y硫酸钡沉淀的质量=200g+100g-276.7g=23.3gNa2SO4+BaCl2═BaSO4↓+2NaCl142 233 117x 23.3g y142x=23323.3g x=14.2g2332...