The Sahara Festival is a celebration of the very recent past. The three-day event is not f

The Sahara Festival is a celebration of the very recent past. The three-day event is not fixed to the same dates each year, but generally takes place in November or December. It is well attended by tourists, but even better attended by locals.
During the opening ceremonies, after the official greetings from the government leaders, people who attend the festival begin to march smartly before the viewing stands, and white camels transport their riders across the sands. Horsemen from different nations display their beautiful clothes and their fine horsemanship. One following another, groups of musicians and dancers from all over the Sahara take their turn to show off their wonderful traditional culture. Groups of men in blue and yellow play horns and beat drums as they dance in different designs. On their knees in the sand, a group of women in long dark dresses dance with their hair: their long, dark, shiny hair is thrown back and forth in the wind to the rhythm of their dance.
The local and visiting Italian dogs are anxious to run after hares. The crowd is on its feet for the camel races. Camels and riders run far into the distance, and then return to the finish Line in front of the cheering people.
Towards the evening, there comes the grand finale of the opening day, an extremely exciting horserace. All the riders run very fast on horseback. Some riders hang off the side of their saddles. Some even ride upside down -- their legs and feet straight up in the air -- all at full speed. Others rush down the course together, men arm in arm, on different horses. On and on they went. SO fast and so wonderful!
【小题1】The Sahara Festival is a festival which .A．has a very long history in North AfricaB．is held in the same place on the same dayC．is attended mainly by the people in the SaharaD．is celebrated mostly by travelers from different countries【小题2】Before the races begin, take part in the activities during the opening ceremonies.A．musicians, dancers, horses and haresB．camel riders, musicians, dogs and haresC．horsemen, dancers, camels and dogsD．musicians, officials, camels and horses【小题3】The underlined word finale in the fourth paragraph most probably means the of the opening day.A．first partB．middleC．last partD．whole【小题4】This passage mainly tells readers .A．what happens on the opening day of the Sahara FestivalB．how people celebrate during the three-day Sahara FestivalC．what takes place at the closing ceremonies of the Sahara FestivalD．how animals race on the first and the last days of the Sahara FestivalC

(答案→)C 解析：【小题1】考查考生对短文中细节的识辨能力。根据文章第一段but even better attended by locals可以确定选项。【小题2】考查考生对短文中细节的整合能力。根据文章内容dogs 和hares 并没有参加表演活动，所以选项A,B,C要被排除。【小题3】考查考生猜测词义的能力。接近傍晚，the opening day 的活动即将结束。【小题4】考查考生概括文章中心的能力。文章重点讲述的是the opening day 而不是the Sahara Festival 所进行的活动。

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2.88×106 73解析分析：利用电功的公式W=Pt求解消耗的电能，知道电器处于待机状态时也是消耗电能的，可以通过切断电源节省这部分电能．解答：当彩电正常播放节目时的功率为150W，消耗的电能W=Pt=0.15kW×4h=0.6kW?h；
待机时的功率为10W，所以消耗的电能W′=P′t=0.01kW×20h=0.2kW?h，
所以每天平均消耗电能为0.6kW?h+0.2kW?h=0.8kW?h=2.88×106J；
一年以365天计算可节省电能△W=W′n=0.2kW?h×365=73kW?h．
故

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