Alice didn't notice I was coming, her mi_爱下问搜题

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问题选择题

Alice didn't notice I was coming, her mind _______ the work she was doing.

[ ]

A. was totally fixed on

B. was totally fixing on

C. totally fixed on

D. totally fixing on

答案

答案：C

选择题

化学与生产、生活密切相关．下列说法正确的是（　　）

A．Al₂（SO₄）₃可用于对自来水进行杀菌消毒

B．常温下用铝制容器盛装硝酸或浓硫酸

C．使用催化剂提高可逆反应的平衡转化率

D．利用二氧化硅和碳在高温下反应制取粗硅

多项选择题

事故发生时，现场人员的行动原则是（）。

A．积极抢救

B．及时汇报

C．安全撤离

D．妥善避难