题目

下列物质的用途，主要利用了物质的化学性质的是（    ）  A．氧气用于急救病人         B．“干冰”用于人工降雨  C．生铁铸造铁锅             D．铜用于制造导线  答案：A 第二节：完形填空(共20小题，每小题1．5分，满分30分)     阅读下面短文，掌握其大意，然后从36～55各题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。     Throughout history，people have been the victims of pickpockets．Today，  36  is one of the most rapidly increasing  37 ．Pickpockets are increasing   38  and developing better methods to Practice their skill．  39  one million Americans lose money to pickpockets every year．No one is really safe  40   a skilled pickpocket．His victims，or“marks” 41  they are rolled，can be rich or poor，young or old．  42 the 18th century，pickpockets   43  in England．Large crowds of people would gather to watch the hanging  44  was supposed to be a warning to other pickpockets．  45  ，in time the practice Was discontinued．     Police officials say that most   46  pickpockets come from South America． 47 these expert pickpockets  48   in special schools called Jingle Bell School．A pickpocket graduates from a J．B． 4 9 he is able to steal a wallet from a dressed dummy that has  50 inside its pockets!     Some of the  51  places of pickpockets are banks，airports，supermarkets，trains and bus stations．  52  a pickpocket will work with another pickpocket  53  his partner．  54  being the victim of a pickpocket，it is   55  to be very careful when in the midst of large gatherings of people． 36．A．pick pocketing            B．stealing pickpockets      C．to pickpocket              D．to steal pickpockets 37．A．headaches            B．faults            C．mistakes                 D．crimes 38．A．by far                  B．at random    C．in number              D．out of order 39．A．Automatically      B．Obviously    C．Approximately       D．Subsequently 40．A．against                B．with             C．out of                    D．from 41．A．since                   B．as                 C．so                          D．thus 42．A．At                       B．Since            C．From                     D．During 43．A．were hanged        B．would hang    C．were hung              D．must be hung 44．A．what                   B．of which       C．which                    D．among whom 43．A．Therefore            B．At once        C．Because                 D．However 46．A．attractive             B．convenient    C．efficient                 D．serious 47．A．Much of              B．A large amount of        C．Many of                 D．A great number 48．A．are researched      B．specialize             C．are trained              D．major 49．A．where                  B．when                   C．although                D．however 50．A．money                 B．jewelry                C．bells                      D．rings 51．A．favorite               B．liking                      C．favored                  D．be liked 52．A．Seldom               B．Once                   C．Often                     D．Forever 53．A．like                     B．being                   C．for                        D．as 54．A．To avoid              B．To neglect            C．Trying not              D．To forget 55．A．critical                B．fortunately           C．important               D．obvious