下列各组离子在水溶液中能大量共存的是（） A．Fe2+、Ca2+、CO32-、O_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

下列各组离子在水溶液中能大量共存的是（）

A．Fe²⁺、Ca²⁺、CO₃^2-、OH^-

B．Ba²⁺、H⁺、Cl^-、OH^-

C．Na⁺、SO₄^2-、Cl^-、OH^-

D．Ag⁺、NH₄⁺、NO₃^-、OH^-

答案

答案：C

A、因Fe²⁺、OH^-能结合生成氢氧化铁沉淀，则不能大量共存，故错误

B、因Ba²⁺、OH^-能结合生成氢氧化钡沉淀，则不能大量共存，故错误

C、因离子不能结合生成水、气体、沉淀，则离子一定能大量共存，故正确

D、、NH₄⁺和OH^-可以产生气体NH₃，不能大量共存．故不正确

故选C

阅读理解

阅读短文，判断正(T)误(F)。

Yesterday I walked to the park and played with my cousin, Jing. We saw many people playing happily.

Some were talking, some were walking, some were flying kites. And some were laughing loudly. Jing and I

were flying a kite. It was high in the sky. We had a good time. We also helped a little girl. She cried because

(因为) she fell and hurt her knee.

( ) 1. Yesterday I walked to the restaurant.

( ) 2. Jing is my cousin.

( ) 3. The children were talking.

( ) 4. Jing and I were flying a kite.

( ) 5. We helped a little girl.

选择题

《瓶子、玻璃杯和小提琴》（如下图）是毕加索的代表作之一。作品强调标新立异，而不注重写实。这幅作品所属的艺术流派是

A．浪漫主义

B．现实主义

C．印象主义

D．现代主义