正确掌握化学用语是学好化学的基础。下列化学用语中正确的是
| A．乙烯的结构简式为CH2CH2 | B．葡萄糖的实验式（最简式）为 C6H12O6。  |
| C．Ca2+的结构示意图为 | D．NH4Cl的电子式为 |
相关试题
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
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 |
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