下列说法正确的是（）_刷题宝

题干

下列说法正确的是（）

A：¹³C与¹⁴C属于同一种元素，它们互为同位素

B：淀粉、明矾属于纯净物，矿泉水、食醋属于混合物

C：硫酸、纯碱、醋酸钠和生石灰分别属于酸、碱、盐和氧化物

D：通过滤纸过滤可以得到Fe（OH）₃胶体中的分散质粒子

上一题下一题 0.0难度选择题更新时间:2014-05-06 11:08:07

答案(点此获取答案解析）

A

同类题1

y = \frac{2}{x - 2}

中，自变量x的取值范围为____．

同类题2

根据短文理解, 从A、B、C、D四个选项中选择正确答案填空。

Mr. Smith 1 from London. Now he is in China. He is 2. He teaches 3 a middle school. He works very hard. His students like 4 very much. He can 5 a little Chinese. His students often teaches him Chinese 6 Sundays. Mr. Smith likes playing football. He often plays football 7 his students.

Mr. Smith 8 a son. His name is Jack. He is student. He studies in a middle school. He goes to school 9 bike everyday. He gets back home at four in the afternoon. He likes 10 TV in the evening.

同类题3

读下图，回答下列各题。

同类题4

下图是一份信函，对此信函解读不正确的是（）

同类题5

已知菱形ABCD的边长为6，对角线AC与BD相交于点O，OE⊥AB，垂足为点E，AC=4，那么sin∠AOE=____．

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