题目

用化学符号或者化学式填写：⑴个氢原子         ；     ⑵五氧化二氮分子           ；⑶食盐水中的溶质         ；⑷地壳中含量最高的金属元素         。 答案：2H；N2O5；NaCl；Al解析:略 Mr. Evmas lived in a city．He was a math    l   three years ago．He taught well and his students   2   him．So he decided to work in the middle school all his life．But a terrible accident   3    his fortune（命运）． One spring he took his class to   4   a place of interest（名胜）by bus．The children saw a lot of    5    things and had a great time there．But on their way to school，their   6   was hit by a truck because the young driver was drunk（喝醉）．Five students   7   and more than half of the children were    8    in the accident．He didn't know how it had happened and very   9    it and after he came out of hospital，he left the school and became a  __10  ．He tried his best to stop the drivers from breaking the traffic rules．He worked hard and was strict with the drives．So they were afraid of him． One afternoon it was very hot．Mr. Evans was    11   ．He was standing at the crossing and watching the traffic．Suddenly he saw a    12    rushing towards the crossing．It run so fast that it almost hit a man    13    a bike．He stopped it at once and saw a girl in it． “   14   your license to me，madam，”said Mr. Evans． The girl passed on her bag to him and said，“Please look for it in the bag  15  ．I can’t see anything without glasses．” 1．A．worker                  B．teacher                C．doctor                 D．farmer 2．A．liked                      B．wished                 C．helped                    D．answered 3．A．beat                      B．won                    C．lost                        D．changed 4．A．build                     B．break                   C．visit                       D．find 5．A．terrible                  B．dangerous            C．safe                       D．interesting 6．A．bus                       B．train                    C．car                         D．ship 7．A．left                        B．lived                    C．died（死）             D．fell 8．A．beat                      B．injured                 C．touch                     D．stopped 9．A．sad about               B．afraid of               C．interested in            D．worried about 10．A．soldier                 B．policeman            C．bookseller              D．cleaner 11．A．in the corner        B．at home               C．on duty（值班）     D．in the office 12．A．runner                 B．policeman            C．player                  D．car 13．A．riding                  B．selling                  C．buying                   D．making 14．A．Throw                 B．Show                         C．Lend                   D．Copy 15．A．you                     B．I                         C．yourself                 D．myself