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Directions: In this section you will hear a recorded short passage. The passage is printed on the test paper, but with some words or phrases missing. The passage will be read three times.A mother and her seven years old daughter were resting in their room in a big hotel in Thailand when suddenly a fire ______(1). Very soon thick black smoke started to come into their room and there was hardly any air. Their lives were _____(2). The mother opened the door only to find that the hall way was also full of smoke. She ran to the telephone to call for help but the line was _______(3). Then she put wet towels over her daughter’s face and her own so that they could breathe. Later firefighters lowered a rope from the hotel roof to their _____(4)level and pulled them up to the roof. ______(5)people were killed in the fire but fortunately they were saved.
从云计算的服务类型来看,()是将应用程序平台功能作为服务提供给用户,为用户提供基于互联网的应用开发环境。
电子商务的系统框架一般包括哪三个层次?
电子商务的外部环境主要包括哪些?
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