题目

   元素周期表中，钾元素的信息如右图所示。下列解释不正确的是 A．原子序数是19B．原子中核电荷数是19 C．原子中质子数是19   D．相对原子质量是39.10 g 答案：D短文改错 　　A twenty-year-old foreign American , Levi Strauss, came to 　 the United States in the 1850 to seek his fortune in the 1．________ gold fields. But strange enough , this man made his 2．________ fortune on heavy canvas （帆布） what he found suitable for 3．________ working clothes. Strauss' jeans are particularly good 4．________ for explorers and cowboys. In the early days of jeans, 5．________ this man couldn't guessed that his trousers , made 6．________ only by rough work , would become so popular at all 7．________ levels of society. Yes , that is a fact: jeans have become 8．________ popular in our society. However, these trousers 9．________ have come to standing for changes in social attitude. 10．________