在有机物分子中，若某个碳原子连接着四个不同的原子或原子团，则这个碳原子称为“手性碳原子”凡是只有一个手性碳原子物质一定具有光学活性，物质
有光学活性，发生下列反应后无光学活性的是
| A．与新制的Cu(OH)2作用 | B．与甲酸发生 酯化反应 |
| C．与NaOH水溶液共热 | D．在催化剂存在下与H2加成 |
相关试题
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
粤公网安备 44130202000953号