问题
选择题
超临界CO2流体是一种和水相似，能阻燃、溶解能力强的绿色环保溶剂。下列有关超临界CO2流体的说法错误的是
A．不能燃烧
B．是CO2呈现的一种状态
C．可取代多种有毒、易燃的溶剂
D．是一种与CO2化学性质不同的物质
答案
答案：D
题目分析：超临界CO2流体是二氧化碳的一种状态，化学性质和二氧化碳相似，根据题目所给的用途可知D是错误的
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超临界CO2流体是一种和水相似，能阻燃、溶解能力强的绿色环保溶剂。下列有关超临界CO2流体的说法错误的是
A．不能燃烧
B．是CO2呈现的一种状态
C．可取代多种有毒、易燃的溶剂
D．是一种与CO2化学性质不同的物质
答案：D
题目分析：超临界CO2流体是二氧化碳的一种状态，化学性质和二氧化碳相似，根据题目所给的用途可知D是错误的
阅读下面短文，从短文后各题所给的四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。 After years of searching, a truth seeker was told to go to a cave, in which he would find a well. “Ask the well what is 36 , ” he was advised, “and the well reveal (告诉，揭露) it to you.” Having found the well, the seeker asked that most basic and important 37 . And from the depths came the answer: “Go to the village crossroad, and there you shall find what you are seeking.” Full of 38 the man ran to the crossroad to 39 only three rather uninteresting shops. One shop was selling pieces of metal, another sold 40 , and thin wires were for sale in the third. Nothing and no one there seemed to 41 much to do with the revelation of truth. Disappointed, the seeker returned to the well to demand an 42 , but he was told only: “You will 43 in the future.” As years went by, the 44 of his experience at the well gradually 45 until one night, while he was walking, the sound of sitar (西塔琴) music 46 his attention. It was wonderful and it was 47 with great skill and inspiration. Deeply 48 , the truth seeker felt drawn towards the 49 . He looked at the fingers dancing over the strings. And then suddenly he let out a cry of joyful 50 : the sitar was made out of wires and pieces of metal and wood just like 51 he had once seen in the three stores. At last he understood the 52 of the well: we have already been given everything we need; our 53 is to assemble (聚集) and use them in the proper way. Nothing is 54 so long as we recognize only fragments (碎片). But as soon as the pieces are put together, something new appears, whose nature we could not have 55 by considering the fragments alone.
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