【正文】 t l eave until thi s eveni ng, ” sai d Li u Qi an. “Let’s go downtown. O l d Montreal i s close to the water.” They spent the afternoon i n l ovel y shops and vi si ting arti sts i n their workpl aces besi de the water. As they sat in a Buffet restaurant l ooki ng over the broad St Lawrence Ri ver, a young m an sat down wi th them . “H el o, m y nam e i s H enri. I’m a student at the uni versi ty nearby,” he sai d,” and I was wondering where you are from. ” The gi rls tol d him they were on a trp across Canada and that they had onl y on day i n Montreal. “That39。s too bad, ” he said. “Montreal i s a ci ty wi th wonderful restaurants and clubs. Most of us speak both Engl ish and French, but the ci ty has French culture and traditions. We love good coffee, good bread and good m usi c.” That ni ght as the transfer was speedi ng 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 編制時間：二 0 一 0 年九月 a chance to make a tri p i nto space wi th m y fri end Li Yanpi ng, an astronom er. We vi si ted the m oon i n our spaceshi p! Before we l eave, Li Yanping expl ai ned to m e that the forece of the gravi ty woul d change three ti m es on our journey and that the fi rst change woul d be the m ost powerful . Then we were off. As the rocket rose i nto the ai r, we were pushed back i nto our seats because we were tryi ng to escape the pul of the earth’s gravity. It was so hard that we coul d not say anythi ng to each other. Gradual y the wei ght lessened and I was abl e to tal k to him . “ Why i s the spaceshi p not fal ing back to the earth? O n the earth i f I fal from a tree I wi l fal to ground.” I asked. “ We are too far from the earth now to feel i ts pul l, “ he explai ned, “ so we feel as i f there i s no gravi ty at al l. When we get closer to the m oon, we shal l feel i ts gravi ty pul ing us, but i t wil l not be as strong a pul as the earth’s. “ I cheered up imm edi atel y and floated wei ghtl essly around i n our spaceshi p cabi n watchi ng the earth be e sm al ler and the m oon l arger. When we got there, I wanted to expl ore i mm edi atel y. “ Com e on, ” I sai d. “ If you are ri ght, m y m as wi l be l ess than on the earth because the m oon is sm al l er and I wi l be abl e to m ove more freely. I m ight even grow tal er i f I stay here l ong enough. I shal certai nl y wei gh l ess!” I laughed and cl im bed down the steps from the spaceshi p. But when I tri ed to step forward, I found I was carri ed twice as far as on the earth and fel over. “ O h dear, ” I cried, “ wal ki ng does need a bit of practi ce now that gravi ty has changed. ” After a whi l e I got the hang of i t and we began to enjoy oursel ves. Leavi ng the m oon’s gravi ty was not as pai nful as l eavi ng the earth’s. But returning to the earth was very fri ghteni ng. We watched, amazed as fi re broke out on the outsi de of the spaceshi p as the earth’s gravi ty i ncreased. Agai n we were pushed back hard i nto our seats as we cam e back to l and. “ That was very exhausti ng but very exci ti ng too,” I sai d. “N ow I know m uch m ore about gravi ty! Do you thi nk we coul d bi si t som e stars next tim e?” “O f course, ” he smi led, “ whi ch star woul d you li ke to go to?” Caught by a black hol e The spaceshi p warned Li Yanpi ng and m e to be ready as we were approachi ng the “bl ack hol e”. We coul d see som e fai nt l i ghts around what l ooked li ke an em pty space. Li Yanpi ng sai d, “ That em pty hol e i s l ike a m outh al ways needi ng to be fed. Those l ights are thi ns that are bei ng pul ed i nto ti me by the gravi ty of the hol e. ” We watched wi th i nterest and am azem ent at the l i ghts whi ch seem ed to be goi ng fai nter and fai nter round the edge of the bl ack hol e. Just then the l ights on our spaceshi p went our the and the puter stoped worki ng. What was hapeni ng? I tri ed to turn the spaceshi p away from the hol e but it woul d not m ove. Woul d i t eat us too? Suddenl y the spaceship jum ped and began to m ove round the edge of trhe hole to. The gravity of the “bl ack hol e” was pul li ng us i nto its “m outh”. As the spaceshi p m oved round the bl ack hol e, I fel t rather si ck. My m outh went dry and I cl osed m y eyes. Al l the stori es about what happened when you were caught by the gravi ty of a “bl ack hol e” seem to be true. But then the spaceshi p jum ped agai n. Thi s tim e i t m oved si deways and away from thi s edge of the “bl ack hol e”. Som eone watchi ng m e woul d have seen the spaceshi p flyi ng li ke a bi rd away from the “bl ack hol e”. But we fel t nothi ng. At l ast we were abl e to l ook around us. Luckil y the puter had started worki ng agai n. We real i zed that we had di scovered som ethi ng new about “black hol e”. If you go insi de the edge of a “bl ack hole”, i t wi l “eat” you and there i s no escape。 but i f you do not, you m ay have an opportunity to escape. H ow exci ti ng! Uni t 5 A tri p on “ The True North” Li Daiyu and her cousi n Liu Qi an were on a tri p to Canada to bi si t thei r cousins i n Montreal on the Atl anti c coast. Rather than take the aeropl ane al l the way, they deci ded to fl y to Vancouver and then take the trai n west to east acros Canada. The though that they coul d cross the whol e conti nent was exciti ng. Thei r fri end, Danny Lin, was wai ti ng at the ai rport. H e was goi ng to take them and thei r baggage to catch “The True N orth”, the cross Canada trai n. O n the way to the stati ion, he chatted about thei r tri p. “You’re goi ng to see som e great scenery. Goi ng eastward, you’l pass m ountai ns and thousands of l akes and forests, as wel l as wi de ri vers and l arge ci ti es. Som e peopl e have the i dea that you can cros Canda i n l ess than fi ce days, but they fet the fact that Canada i s 5500 kil om eters from coast to coast. H ere i