题目内容
Did the chicken come before the egg, or the egg before the chicken? This is a question of how life began in general.(whether... or...)
查看答案
搜索结果不匹配？点我反馈
更多问题
Does she still want to go to the lake? Or has she changed her mind? It’s not clear.(whether... or...)
1.Replace the underlined partA.enable B.dwarf our old house C.on track D. and so forth E. around the corner1. You see the lights in the students’ reading room? They never go out at night these days because the final exams aredrawing near.( )2.Atthat time the working class was too small to make a successful revolutionthere.( )3. The high-rise building in the back makesour old house seemsmall.（ ）4. The figures show that our economy is healthy and we are likelyto achieve sustainable and balanced (平衡的) growth. ( )5. The two girls spent the whole night planning the summer events, get-togethers, dinner parties, and many other things of the kind. ( )
2. ClozeA. abundantB. complicatedC. conflictD. confrontedE. distributedF. environmentG. highlightH. innovationI. intensifiedJ. outcomeK. rateL. reliableM. replaceN. sourceO. subsequentWater is life. We depend on it to keep us and the 1 healthy. Nonetheless, many people take water as a natural resource for granted. Today, the situation has changed. As the population of the world increases, and with it the demand for water, there is growing concern that our water supplies will not be as 2 as we think. Eighty countries now have water shortages and 2 billion people lack access to clean water. One billion people lack enough water to supply meet their basic needs.While nearly 70 percent of the world is covered by water, only 2.5 percent of it is fresh. This tiny amount of fresh water available on the planet has remained fairly constant over time and is 3 unevenly around the world. The growth of the world population, therefore, 4 competition for a clean supply of water every year. Worse still, humans are not efficient users. According to the United Nations, water use has grown at more than twice the 5 of population increase in the last century. The reality is that an increasing number of regions are 6 with water scarcity. By 2025, two-thirds of the world’s population may face water shortage.An adequate and 7 water supply is essential to the future of every country. To increase and conserve supplies of fresh water, many countries have been working at technological 8 , one of which is in the process of desalination. New filtration systems have been developed to 9 traditional heating methods. Thus the expected 10 can be achieved: lower costs.
最早的钢筋混凝土结构设计理论，是采用以(_ )为基础的容许应力计算法,这种方法要求在规定的标准荷载作用下，按弹性理论计算得到的构件截面任一点的应力应不大于规定的容许应力.
微信支付 
支付宝支付