题干

已知氯化银在水中存在沉淀溶解平衡:AgClAg+ + Cl-,25℃时氯化银的KSP=1.8×10-10。现将足量的氯化银分别放入下列选项的溶液中,充分搅拌后,相同温度下,银离子浓度最小的是(      )

A:100mL蒸馏水中

B:50mL0.1mol·L-1的氯化镁溶液

C:100mL0.1mol·L-1的氯化钠溶液

D:50mL0.1mol·L-1的氯化铝溶液

上一题 下一题 0.0难度 选择题 更新时间:2018-02-14 11:15:01

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D

同类题2

阅读理解

    In 1863, the great novelist Jules Verne wrote a novel called Paris in the Twentieth Century. In the book he used the full power of his great ability to forecast the coming century. Unfortunately, the manuscript (手稿) was lost until his great-grandson happened to discover it lying in a safe where it had been carefully locked away for almost 130 years. Realizing what a treasure he had found, he arranged to have it published in 1994, and it became a bestseller at once.

    Back in 1863, kings still ruled the ancient world in Europe, with so many poor people working in the fields. And steam power was just beginning to change the world. But Verne predicted that Paris in 1960 would have glass skyscrapers, air conditioning, TV, high-speed trains, gas-powered vehicles, and even something similar to the Internet. Verne described life in modem Paris almost without any mistakes.

    Just two years later Verne made another amazing prediction. He wrote From the Earth to the Moon, in which he predicted the details of the task that sent several astronauts to the moon 100 years later in 1969. He correctly predicted the size of the space capsule, the number of astronauts who would carry out the task, the weightlessness that the astronauts would experience, and the final landing in the ocean.

    How was Jules Verne able to predict 100 years into the future successfully? Although he was not a scientist himself, Verne often turned to scientists, asking them questions about their opinions of the future. He collected a vast amount of information about the great scientific discoveries of his time. Verne realized that science would make it possible for many amazing things to appear in the future. The secret of his successful prediction was his belief in the power of science to change society.

同类题3

追求民主与法制,反对专制与独裁是世界各国人民的不懈追求,自人类诞生以来,世界各国人民为追求民主与法制就进行了许多的尝试与努力。阅读材料,回答下列问题:
材料一 有人认为:英国的“光荣革命”既不是一次微不足道的政变,也不是一次以建立“平衡宪法”为归宿的政治妥协,而是议会与国王权力关系史上的决定性转折点。
材料二 美国总统威尔逊曾说过:“我们的宪法(1787年宪法),它是一块奠基石,而不是一座完整的大厦;它是根,而不是完美的藤。”
材料三 1954年9月,第一届全国人民代表大会在京召开并通过了《中华人民共和国宪法》,初步奠定了社会主义民主和法制的基础。但“文革”期间,民主法制遭到严重破坏。1982年五届人大五次会议通过了修订的《中华人民共和国宪法》,这对于推进新时期的民主和法制建设具有重要作用。
(1)结合所学知识,回答材料一中议会与国王权力关系发生了怎样的变化?
(2)依据材料二结合所学知识回答,美国1787年宪法确立了怎样的政体形式?
(3)回答材料三中《中华人民共和国宪法》的性质。 并举出新时期我国法制建设取得的重大成就一例。
(4)依据上述材料结合所学知识,概括指出人类政治文明演进的趋势, 并谈谈对我国民主与法制建设的启示。