去热带旅游,要注射疫苗 以防止黄热病;这些疾病通过蚊虫传播,要携带蚊帐, 还要去药店,买防虫水; 因为途中要走不少路,所以要穿适合不行的靴子;旅游要花钱,可以带旅游支票或者信用卡。
与此同时,上课老师也可以补充相关的背景内容,在扩充文化背景内容的同时对所涉及的场景加以巩固,还能让整个课堂内容显得十分饱满。例如:
The Sydney Opera House is an expressionist modern design, with a series of large precast concrete shells, each taken from a hemisphere of the same radius, forming the roofs of the structure. The Opera House covers 1.8 hectares of land. It is 183 metres long and about 120 metres wide at its widest point. It is supported on 588 concrete piers sunk up to 25 metres below sea level. Its power supply is equivalent for a town of 25,000 people. The power is distributed by 645 kilometres of electrical cable.
The roofs of the House are covered with 1,056,006 glossy white and matte cream Swedish-made tiles, though from a distance the tiles look only white. Despite their self-cleaning nature, they are still subject to periodic maintenance and replacement.
The Concert Hall is contained within the western group of shells, the Opera Theatre within the eastern group. The scale of the shells is chosen to reflect the internal height requirements, rising from the low entrance spaces, over the seating areas and up to the high stage towers. The minor venues are located beneath the Concert Hall, as part of the western shell group. A much smaller group of shells set to one side of the Monumental Steps houses the Bennelong Restaurant. Although the roof structures of the Sydney Opera House are commonly referred to as shells , they are in fact not shells in a strictly structural sense, but are instead precast concrete panels supported by precast concrete ribs.
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