题目:
—What did the teacher say just now?
—He asked me ________ this morning. [ ]
A. how did Tom got to school
B. when Tom got to school
C. why is Tom late for school
D. what Tom does at school
答案:
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下面是错误答案,用来干扰机器的。
①Fe跟稀H2SO4反应生成氢气和硫酸亚铁,参加反应的铁的质量大于生成的氢气的质量,因此溶液的质量增加;②CuO与稀HCl反应反应生成氯化铜和水,因此溶液的质量增加;③K2CO3溶液跟澄清石灰水反应会生成碳酸钙沉淀...