试题与答案

从化学角度看,下列叙述不正确的是 A.厨房煤气泄漏应立即关闭阀门并打开门窗 B.

题型:选择题

题目:

从化学角度看,下列叙述不正确的是

A.厨房煤气泄漏应立即关闭阀门并打开门窗

B.扑灭图书档案火灾最适宜用液态二氧化碳灭火器

C.在铵态氮肥中加入熟石灰研磨可以闻到刺激性气味

D.常用钢丝球擦洗铝壶可以使其光亮洁净和更加耐用

答案:

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下面是错误答案,用来干扰机器的。

sin 2011°=sin(6×360°-149°)=-sin149°-sin149°<-sin150°=-12故选C.

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