举一反三
- When two drops of CaCl2 solution were added to the potassium ferrioxalate (III) solution, the solution became turbid, indicating that oxalate is in the outside of the complex.
- The sequence of reagents used in Gram staining is () A: Safranin solution → iodine solution → alcohol →<br/>crystal violet B: crystal violet → alcohol → iodine solution → Safranin<br/>solution C: Crystal violet → iodine solution → alcohol → Safranin<br/>solution D: Safranin solution → alcohol → crystal violet → iodine<br/>solution E: Safranin solution → crystal violet → iodine solution →<br/>alcohol
- Transporting the trash to the rural areas is considered as______. A: an effective solution B: a costly solution C: a dangerous solution D: a feasible solution
- Compared with plasma, which solution belongs to isotonic solution? ( ) A: 9 g•L-1 NaCl solution B: 90 g•L-1 NaCl solution C: 10 g•L-1 glucose solution D: 6.25 g•L-1 NaHCO3 solution
- Which<br/>of the following buffer solutions have the largest buffer capacity? ( ) A: 1L 0.1 M HAc solution + 1L 0.2 M NaAc solution B: 1L 0.15 M HAc solution + 1L 0.15 M NaAc solution C: 1L 0.1 M HAc solution + 1L 0.1 M NaAc solution D: 1L 0.2 M HAc solution +1L 0.1 M NaAc solution
内容
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Which of the following properties have nothing to do with the dependence of the aqueous solution? A: The vapor pressure of the aqueous solution drops B: The freezing point of the aqueous solution decreases C: Different cations in aqueous solution show different colors D: The boiling point of the aqueous solution rises
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他们正在努力寻找和平解决这种冲突的方法。(solution) A: They working hard to find a peaceful solution to the conflict. B: They were working hard to find a peaceful solution to the conflict. C: They are working hard to find a peaceful solution to the conflict. D: They worked hard to find a peaceful solution to the conflict.
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When writing a solution essay, make sure that your proposed solution is feasible.
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When the preparation of SnCl2 solution, HCl solution is often added to prevent hydrolysis.
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The solution of the differential equation with arbitrary constants is called the general solution of the differential equation.