任务型阅读

    A traveler came out of the airport. There were a lot of taxis. He asked every taxi driver his name. Then he took the third one. It cost 5 dollars from the airport to the hotel. "How much does it cost for the whole day?" The man asked. "100 dollars," said the taxi driver. This was very expensive, but the man said it was OK.

    The taxi driver took the man everywhere. He showed him all the parks and museums in the city. In the evening they went back to the hotel. The traveler gave the taxi driver 100 dollars and said, "What about tomorrow? It's another 100 dollars. "But the man said, "That's OK! See you tomorrow." The taxi driver was very pleased.

    The next day the taxi driver took the traveler everywhere again. They visited all the parks and museums again, and in the evening they went back to the hotel. The man gave the taxi driver 100 dollars again and said, "I'm going home tomorrow." The taxi driver was sorry because he liked the traveler and, above all, 100 dollars a day was a lot of money. "So you're going home. Where do you come from?" he asked. "I come from New York!" said the traveler. "I have a sister in New York. Her name is Susanna.  Do you know her?" "Of course I know her. She gave me 200 dollars for you! "

绿色开花植物的结构层次是：____ →____ →____ →个体.

纵观科技发展的轨迹，它的每次重大突破，都会引起经济的深刻变革和人类社会的巨大进步，这说明（    ）

有一电路图如图所示，其中R₁=R₂=R₃=R₄=R₅=5Ω，电源两端的电压U=7V，试求：

喜、怒、哀、乐是人类情绪的四种基本形式。（  ）