题目内容
In many English-language cultures, asking an adult’s age directly - particularly a woman’s age - is polite.
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The good way to ask someone about his or her age is to say “Do you mind me asking how old you are? "
When you answer someone about your age, the answer to this can be straight: "I'm 25 years old." or just "I'm 25."
考虑四种C3H5Cl3异构体。其中有一种的核磁共振谱有两个1HNMR单峰和三个13CNMR信号？
C5H12O2化合物在3300至3400cm-1处具有强红外吸收。1H NMR谱在δ0.9，δ3.45和δ3.2ppm处有三个单峰; 相对比例为3：2：1。 向样品中添加D2O消除了较低的场信号。13C NMR谱显示三个信号均在高于δ100ppm的场中。以下哪种化合物最适合这些数据？()
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