题型:填空题 — Hi, Tom! Could you spare me a minute? I want to have a word with you.— Sure, Jean. _________.[ ]A. You must be worried. B. It doesn’t matter.C. What’s up? D. Why me? 查看答案
题型:填空题 下列各组离子,在所给条件下一定大量共存的是A.pH=0的溶液中:Fe3+、Mg2+、NO3-、SO42-B.含有大量Al3+的溶液中:K+、NH4+、Na+、CO32-C.水电离的氢离子浓度为1×10-11 mol·L-1 溶液中:K+、AlO2-、Cl-、HCO3-D.在含大量Fe3+的溶液中:NH4+、Na+、Cl-、SCN- 查看答案