题目

与 的和再减去 与 的差是    答案：【答案】【解析】根据已知， 与 的和再减去 与 的差是（），可列算式为：（ ＋ ）－（ － ）＝（ ＋ ）－（ － ）＝ － ＝ － ＝ ＝ 故答案为： 此题是考查分数加、减混合运算完形填空 　　This autumn was the wettest since records began in the UK. Floods 1 large parts of the country. In Australia floods have covered an area the 2 of the whole of Britain. How does it happen? Cars, factories and power stations 3 carbon dioxide () into the air. This gas 4 the atmosphere and causes the polar ice to 5 . Sea levels across the world 6 . What are we going to do about it? In 1990, leaders of all the big nations met in Japan and agreed to reduce 7 they put into the atmosphere. Ten years 8 ,in November 2000, they met again in Holland to assess (评估) the situation and decide what to do next. Maybe the following is one of the ways. 　　The village of Yaluma 9 in the mountains of Chiapas, a province of Southern Mexico. Its people are Mayan Indians. They are some of the poorest people in a poverty 10 country. 11 now they have an extra source of income. They are being 12 to grow, develop and 13 forests by the organization in 14 of Formula One racing (一级方程式赛车). 　　Every year, the global Formula One racing pumps 5,500 tons of into the atmosphere. The idea is that the forests being planted around Yaluma will absorb this amount. It will also provide local people 15 money while 16 out motor racing's environmental debt. 　　Projects 17 this go under the name of “Carbon trading.” The basic 18 is that governments and companies can buy the 19 to pump into the air by investing (投资) in green 20 that take it out again. 1． [　　] A．coveredB．ruined C．destroyedD．rushed away 2． [　　] A．widthB．height C．lengthD．size 3． [　　] A．send offB．pump C．give upD．set off 4． [　　] A．burnsB．pollutes C．damagesD．heats up 5． [　　] A．meltB．disappear C．flowD．run away 6． [　　] A．risesB．raises C．aroseD．lift 7． [　　] A．manyB．a number of C．the amount ofD．a good many 8． [　　] A．afterB．about C．laterD．soon 9． [　　] A．liesB．crowds C．laysD．falls 10． [　　] A．developedB．attracted C．strickenD．forbidden 11． [　　] A．ButB．And C．HoweverD．Therefore 12． [　　] A．paidB．given C．takenD．spent 13． [　　] A．deal withB．control C．look afterD．cut down 14． [　　] A．needB．favour C．honourD．charge 15． [　　] A．inB．with C．byD．on 16． [　　] A．wipingB．wiping up C．cleaningD．paying 17． [　　] A．asB．like C．the same asD．except 18． [　　] A．factB．meanings C．ideaD．things 19． [　　] A．forestsB．methods C．rightD．debt 20． [　　] A．projectsB．plants C．materialsD．tress