下列有关化学知识的叙述中正确的是
| A．Al、Fe、Cu在潮湿空气中放置一段时间后均只生成氧化物 |
| B．“水滴石穿”是因为CaCO3与CO2、水发生了化学反应 |
| C．氯气具有酸性，所以可用氯气与烧碱或石灰乳反应制备含氯消毒剂 |
| D．氢氟酸具有弱酸性，所以可用氢氟酸雕刻玻璃 |
相关试题
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 |
I’m sure that your letter will get______ attention. They know you’re waiting for the reply. 
| A．continued | B．immediate | C．careful | D．general |
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
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