题干

某无色溶液中加入NaHSO4溶液后离子仍能大量共存,此溶液中可能含的离子组是

C:Ba2、K、NO3

A:Cu2、Cl、NO3

B:HCO3、K、SO42-

D:Al3+、NO3、Na+

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答案(点此获取答案解析)

D

同类题2

完型填空

    Once again, I had run away and really did not know why. I walked out of the gate to go to school and then kept 1. I had just turned eleven years old the week before. It was almost dark; I was tired, scared, cold, and all alone. I had not eaten all day and was afraid to turn 2 into the police.

    As darkness fell, I made my way over to the city park 3 on Park Street. I entered the darkened area and sat down on one of the wooden benches.“Well, hello, young man.” A voice came from 4 me. I jumped, almost falling off the park bench. I could feel my heart beating in the side of my neck. I could 5 catch my breath. I looked back and saw a woman standing behind me in the shadows. She found I was 6 because of feeling cold, so she took off her large scarf and covered it 7 my shoulders. Looking into my eyes, she8 me if I need something to eat. After I said “yes”, she held out her hand and told me to take the very letter 9 I was unable to see to the store owner. I looked at her outstretched arm but saw 10 in her hand. However, I 11 my hands slowly, acting as though I was taking something from her hand.

    I came to a store with a 12 sitting behind a counter. I opened the door, very slowly I held out my hand which has nothing in it toward her. I watched her face to see if she might think I was crazy or something else.13, she immediately turned and walked to the back of the store for the food I need. After that, I walked out into the street and headed back to the park where the old woman was. “Can I have the letter so I can be magic too?” I asked. Without replying to me,14 she told me the persons who wanted to help15in need would never need the magic letter any more. With these words, she stood up, kissed me on the forehead, removed the large scarf from my shoulders and disappeared into the darkness.

同类题3

近代中国工业化不是对西方生产方式的原样移植,存在着一条立足本土、工农结合、土洋结合进而现代化的通路。阅读下列材料,回答问题:

【艰难曲折的工业化】

材料一:真正成为中国工业化推动者的是清政府,它以洋务派为代表。他们无论是办军事工业,还是民用工业,其主等产业为钢铁、矿产、铁路……即当时所谓的“机器矿路”。这是符合工业发展本身规律的,这些产业部门亦能对整个国民经济产生影响。

—一许紀霖、陈达凯主编《中国现代化史》第一卷

材料二:在这一时期出现的实业投资热,是中国的第二次工业化浪潮。它的主角是以盈利为主要动力的新兴企业家,他们投資的产业主要集中于民生领械,以提供消费类商品为主。面大量广的中小企业是最有活力的主流力量。根据国内学者计算,工业增长率在1912年到1920年达到13.49%

一一吴晓波《历代经济变革得失》

【焕发生机的工业化】

材料三:在中国经济史上,私营企业在1956年的集体消亡是独一无二的事件……-在百年现代化历程中,这是第五次,也是最彻底的国进民退。

——吴晓波《历代经济变革得失》

【相互学习的工业化】

材料四:美国罗斯福新政和中国改革都是对原有社会治理模式不完美的改革和拯救,前者是给資本主义找上一个政府干预的氧气面罩,后者是给社会主义加上一个市场经济的发动机,从而使单純的制度趋于一种混合经济状态,它们都由此解决了旧问题,推动了社会的发展。

——鲍盛则《中国崛起与中国模式》