使用煤气罐应该注意什么？

下列物质属于混合物的是（　　）

A．胆矾

B．白糖水

C．三氧化二铁

D．高锰酸钾

The nurse at a substance abuse center answers the phone. A probation officer asks if a client is in treatment. The nurse responds, "No, the client you're looking for isn't here. " Which of the following statements best describes the nurse's response

A．Correct because she didn't give out information about the client.

B．A breech of the principle of veracity because the nurse is misleading the officer.

C．Illegal because she's withholding information from law enforcement agents.

D．A violation of confidentiality because she informed the officer that the client wasn't there.

把高原与其地形特点用线连起来

下列各句关于文学常识的表述有误的一项是 【      】

A．楚国狂人接舆遇见孔子，并不理会他，自顾自的边走边唱歌，且在子路面前批评孔子“四体不勤，五谷不分”（《论语》）

B．觉慧没有参加高老太爷的大殓仪式，因为道士说他的生肖与大殓的时辰有冲突。他虽然没有反对，但心里不相信这些。（《家》）

C．许攸向袁绍献计攻许昌，袁绍不听，致使许攸投奔曹操。曹操用许攸之计，烧毁袁绍积于乌巢的军粮辎重，大败袁绍。（《三国演义》）

D．清代散文家方苞因受戴名世的牵连而被捕入狱，他亲身体验、观察和了解到清王朝刑部监狱的种种黑暗现实。他以严肃质朴的文字写下了《狱中杂记》。

简述斑铜矿成因产状。