下列关于甲、乙、丙、丁四个图像的说法中，正确的是

A．甲是亚硫酸氢钠粉末投入稀硝酸溶液中有关图像

B．乙是等pH的HA和HB两种弱酸溶液稀释时pH变化图，由此可知HA的酸性弱于HB

C．由丙可知，双氧水在有催化剂存在时的热化学方程式为

2H₂O₂（1）="2H" ₂O（l）+O₂（g） △H=-2（Ea₂’－Ea₂） kJ·mol^-l

D．丁是向硝酸银溶液中滴加氨水时，沉淀质量与氨的物质的量的关系图

Peter Judd joined the army  26   he was eighteen, and for several months he  27   (teach) how to be a good soldier. He did quite well in everything   ___ 28 shooting. One day he and his friends were practicing ___29_____ (shoot), all of __30___were doing quite well except Peter. After he had shot at the target nine times and had not hit it once, the officer  31   was trying to teach the young soldiers to shoot said, "You’re quite    32    (hope). Peter! Don’t waste your last bullet too! Go behind that wall and shoot yourself with it!"

Peter felt ashamed. He went behind the wall, and a few seconds later the officer and the    33    young soldiers heard the sound of a shot.

"Heavens!" the officer said, "Has that silly man really shot   34   ?" He ran behind the wall    35    (anxious), but Peter was all right. "I’m sorry, sir." he said, "but I missed again.”