题目

生活中的下列变化，属于化学变化的是   A．雪糕慢慢融化                      B．吃进的食物被消化   C．电灯泡通电发光                    D．水结冰  答案：B解析:略 Saturday, January 30, 2009 ---- A week-long heat-wave has caused disaster in southern Australia, where bushfires have destroyed up to ten homes, weather records have been broken, and up to 19 people, many elderly, have died during high temperatures averaging over 40°C （104F）. In what is described as "Black Friday", bushfires are burning across the east of the southern state of Victoria, which today rises to a high of 45.1C, its record-breaking third continuous day above 43°C． The bushfires ----- two blazes that combined after wiping out a plantation at the town of Boolarra in the Latrobe Valley to the east of Melbourne ----- have so far destroyed a reported ten homes and burned through more than 2,260 hectares. Five hundred firefighters have tried to hold back the blazes over the past 24 hours but they are still burning. One woman in Boolarra, named Laura, has lost her home and told the Australian Broadcasting that Melbourne and Adelaide were disrupted（混乱）by power blackouts as millions of overheated people switched on air conditioners, and people faced lengthy transport delays as train and streetcar lines buckled（扭曲）in the heat. In Adelaide nineteen, mainly elderly, people are reported to have died during the heat-wave, a higher than average daily figure of sudden deaths. Only two sudden deaths were recorded last Friday. John Hill, the South Australian Health Minister, would not confirm whether the deaths were heat-related, but acknowledged that the increase was high. Even the tennis players at the Australian Open couldn’t escape the heat. On Tuesday Novak Djokovic, the men’s No 3 seed, retired ill from a game after heat-related complaints and the retractable （可伸缩的）roofs on Rod Laver Arena have been closed for part of the past three days. The heat-wave has also affected Tasmania, traditionally Australia’s coolest state, which reached 42.2℃ at Scamander ---- an all-time record for the island． 1．  What was the probable temperature in southern Australia when the bushfires broke out? A．under 40℃            B．42.2℃            C．45.1℃          D．above 43℃ 2．The bushfires caused by high temperature have led to the result that________.    A．ten homes were destroyed in Boolarra B．Melbourne and Adelaide were out of order C．Tennis Australian Open had to be put off three days D．electrical equipment and traffic lines were damaged in Adelaide 3．The last paragraph implies that ___________.    A．Tasmania is an island state of Australia    B．the coolest day in Tasmania is recorded 42.2°C    C．Scamander is the hottest place during the heat-wave    D．the heat-wave has changed the climate in Tasmania 4．Which of the following is the best title for the piece of news? A．High Temperatures Causing Bushfires in Southern Australia B．Some Old People Killed in Bushfires in Southern Australia C．Heat-wave Bringing about Disaster to Southern Australia D．Bushfires Burning Lots of Forests in Southern Australia