【正文】 he top of the Great Lakes. Because of the Great Lakes, they learned, Canada has more fresh water than any other country in the world. In fact, it has onethird of the world’s total fresh water, and much of it is in the Great Lakes.That night as they slept, the train rushed across the top of Lake Superior, through the great forests and southward towads Toronto.“The True North” from Toronto to MontrealThe next morning the bushes and maple trees outside their window were red, gold and orange, and there was frost on the ground, confirming that fall had arrived in Canada.Around noon they arrived in Toronto, the biggest and most wealthy city in Canada. They were not leaving for Montreal until later, so they went on a tour of the city. They went up the tall CN Tower and looked across the lake. In the distance, they could see the Misty cloud that rose from the great Niagara Falls, which is on the south side of the lake. The water flows into the Niagara River and over the falls on its way to the sea.They saw the covered stadium, home of several famous basketball teams. As they walked north from the harbour area, Li Daiyu said, “Lin Fang, one of my mother’s old schoolmates, lives here. I should phone her from a telephone booth.”They met Lin Fei around dusk in downtown Chinatown, one of the three in Toronto. Over dinner at a restaurant called The Pink Pearl, the cousins chatted with Lin Fei, who had moved to Canada many years earlier. “We can get good Cantonese food here,” Lin Feitold them, “ because most of the Chinese people here e from South China, especially Hong Kong. It’s too bad you can’t go as far as Ottawa, Canada’s capital. It’s approximately four hundred kilometers northeast of Toronto, so it would take too long.”The train left late that night and arrived in Montreal at dawn the next morning. At the station, people everywhere were speaking French. There were sighs and ads in French, but some of them had English words in smaller letters. “We don39。t leave until this evening,” said Liu Qian. “Let’s go downtown. Old Montreal is close to the water.” They spent the afternoon in lovely shops and visiting artists in their workplaces beside the water. As they sat in a Buffet restaurant looking over the broad St Lawrence River, a young man sat down with them.“Hello, my name is Henri. I’m a student at the university nearby,” he said,” and I was wondering where you are from.” The girls told him they were on a trp across Canada and that they had only on day in Montreal. “That39。s too bad,” he said. “Montreal is a city with wonderful restaurants and clubs. Most of us speak both English and French, but the city has French culture and traditions. We love good coffee, good bread and good music.”That night as the transfer was speeding along**縣***飼料廠年產(chǎn)50000噸飼料加工新建項(xiàng)目可行性研究報(bào)告建設(shè)單位：*****飼料廠建設(shè)地點(diǎn)：*****縣***鎮(zhèn)***村編制單位：***工程咨詢有限公司***工程咨詢有限公司編制時(shí)間：二0一0年九月a chance to make a trip into space with my friend Li Yanping, an astronomer. We visited the moon in our spaceship!Before we leave, Li Yanping explained to me that the forece of the gravity would change three times on our journey and that the first change would be the most powerful. Then we were off. As the rocket rose into the air, we were pushed back into our seats because we were trying to escape the pull of the earth’s gravity. It was so hard that we could not say anything to each other. Gradually the weight lessened and I was able to talk to him. “ Why is the spaceship not falling back to the earth? On the earth if I fall from a tree I will fall to ground.” I asked. “ We are too far from the earth now to feel its pull, “ he explained, “ so we feel as if there is no gravity at all. When we get closer to the moon, we shall feel its gravity pulling us, but it will not be as strong a pull as the earth’s. “ I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth bee smaller and the moon larger.When we got there, I wanted to explore immediately. “ Come on,” I said. “ If you are right, my mass will be less than on the earth because the moon is smaller and I will be able to move more freely. I might even grow taller if I stay here long enough. I shall certainly weigh less!” I laughed and climbed down the steps from the spaceship. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over. “ Oh dear,” I cried, “ walking does need a bit of practice now that gravity has changed.” After a while I got the hang of it and we began to enjoy ourselves.Leaving the moon’s gravity was not as painful as leaving the earth’s. But returning to the earth was very frightening. We watched, amazed as fire broke out on the outside of the spaceship as the earth’s gravity increased. Again we were pushed back hard into our seats as we came back to land. “ That was very exhausting but very exciting too,” I said. “Now I know much more about gravity! Do you think we could bisit some stars next time?” “Of course,” he smiled, “ which star would you like to go to?”Caught by a black holeThe spaceship warned Li Yanping and me to be ready as we were approaching the “black hole”. We could see some faint lights around what looked like an empty space. Li Yanping said, “ That empty hole is like a mouth always needing to be fed. Those lights are thins that are being pulled into time by the gravity of the hole.” We watched with interest and amazement at the lights which seemed to be going fainter and fainter round the edge of the black hole. Just then the lights on our spaceship went our the and the puter stopped working. What was happening? I tried to turn the spaceship away from the hole but it would not move. Would it eat us too?Suddenly the spaceship jumped and began to move round the edge of trhe hole too. The gravity of the “black hole” was pulling us into its “mouth”. As the spaceship moved round the black hole, I felt rather sick. My mouth went