下列物质的用途，与化学性质无关的是（ ）
A．用稀盐酸使生锈的铁制品恢复光亮
B．生石灰用做食品干燥剂
C．大理石用于建筑材料
D．纯碱用于制取苛性钠
A、用稀盐酸使生锈的铁制品恢复光亮的过程中生成了新物质氯化铁和水，属于化学变化，利用了稀盐酸的化学性质，因为盐酸能够除锈需要通过化学变化表现出来．故错误；
B、生石灰用做食品干燥剂的过程中生成了新物质氢氧化钙，属于化学变化，利用了氧化钙的化学性质，因为氧化钙能和水反应需要通过化学变化表现出来．故错误；
C、大理石用于建筑材料是利用了大理石的硬度大的性质，不需要通过化学变化表现出来，属于大理石的物理性质．故正确；
D、碳酸钠和氢氧化钙反应能生成碳酸钙和氢氧化钠，利用了纯碱的化学性质，因为纯碱能和氢氧化钙反应需要通过化学变化表现出来．故错误．
故选C．
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| This year 1 the 100th anniversary of the sinking of the Titanic. Like some American 2 in the 2008 financial crisis, the ship was thought to be "too big to 3 ". But the banks failed and the Titanic failed.. .spectacularly! After hitting an iceberg, it plunged to the bottom of the 4 Ocean. In less than three hours, the "unsinkable" ship was just a wreck and over1,500 people were dead. Most of us know the story of the Titanic from watching the James Cameron film. It's now been released in a 3D version and new audiences can see the tragic event 5 and be moved by the love story of the two main characters, Jack and Rose. But Titanic is 6 a love story; it's the story of 7 ordinary people react when faced with 8 circumstances. In 1852, the HMS Birkenhead foundered on rocks near the coast of South Africa. The British ship was carrying soldiers, and also many women and children. There weren't enough 9 for everyone so the order was given, "women and children first." 10 the women and children were being saved, the soldiers stood at attention on deck and, 11 , went down with the ship. They faced their death with bravery and 12 . The 13 , "women and children first," became the standard on all British ships and it's exactly what happened on the Titanic. The ship's crew and many passengers realized that they would not be saved, 14 they did not panic. They helped others or 15 calmly for the icy death they knew was inevitable. In the movie, we see the ship's musicians playing to help 16 the passengers. We see the ship's officers keeping order as the lifeboats are loaded. And we see British gentlemen "keeping their heads" as all about them are losing theirs. No one knows how they will react in the face of a disaster. It all 17 one's character. Remarkably, most people behave well. We have seen this in America's 911, in the 2008 Sichuan 18 and in Japan last year. 19 such as the Titanic will happen, but the character of good people is 20 . | ||||
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