题干

根据“性质决定用途,用途体现性质”,下列说法不正确的是(   )

A:一氧化碳可作燃料,体现了一氧化碳的可燃性

B:石墨可作电极,是利用了石墨的导电性

C:氧化钙可做食品干燥剂,是利用氧化钙溶于水中放热

D:氢氧化钙可用来改良酸性土壤,是因为氢氧化钙能中和酸性

上一题 下一题 0.0难度 选择题 更新时间:2018-07-27 09:08:57

答案(点此获取答案解析)

C

同类题4

阅读理解

    Arriving in Sydney on his own from India, my husband ,Rashid, stayed in a hotel for a short time while looking for a house for me and our children.

    During the first week of his stay, he went out one day to do some shopping. He came back in the late afternoon to discover that his suitcase was gone. He was extremely worried as the suitcase had all his important papers, including his passport.

    He reported the case to the police and then sat there,lost and lonely in strange city, thinking of the terrible troubles of getting all the paperwork organized again from a distant country while trying to settle down in a new one.

    Late in the evening, the phone rang. It was a stranger. He was trying to pronounce my husband's name and was asking him a lot of questions. Then he said they had found a pile of papers in their trash can(垃圾桶)that had been left out on the footpath.

    My husband rushed to their home to find a kind family holding all his papers and documents. Their young daughter had gone to the trash can and found a pile of unfamiliar papers. Her parents had carefully sorted them out, although they had found mainly foreign addresses on most of the documents. At last they had seen a half-written letter in the pile in which my husband had given his new telephone number to a friend.

    That family not only restored the important documents to us that day but also restored our faith and trust in people.We still remember their kindness and often send a warm wish their way.