2015职称英语考试用书理工类新增5篇stomata. During the daytime, the stomata of most plants are open. This allows carbon dioxide to enter the leaves for photosynthesis. As night falls, carbon dioxide is not needed. The stomata of most plants close. Water loss stops.If photosynthesis ceased, there would be little food or other organic matter on the earth. Most organisms would disappear. The earth’s atmosphere would no longer contain oxygen. Photosynthesis is essential for life on our planet.词汇：nutrient n.营养物organism n.生物体，有机体carbon dioxide n.二氧化碳chloroplast n.叶绿体molecule n.分子vapor n.水蒸气oxygen n.氧气photosynthesis n.光合作用chlorophyll n.叶绿素glucose n.葡萄糖cease v.停止注释：1．Then animals feed upon the plants.动物以植物为食。
练习：1．In the first paragraph，the word “excess” meansA heavy.B extra.C green.D liquid.2．Which of the following doe s not move through a plant’s stomata?A Carbon dioxide.B Water vapor.C Oxygen.D Food.3．In the title, the term Essential Scientific Process refers toA photosynthesis.B the formation of glucose.C global warming.D water getting to the roots of plants.4．This passage is primarily developed byA explaining a process.B telling a story.C comparing and contrasting.D convincing the reader of plants’ importance.5．Another good title for this passage would beA Oxygen and Carbon Dioxide.B Plants and Their Roots.C How Photosynthesis Works.D Why Our Earth Needs Water.答案与题解：1．B前文讲到，植物产生的氧气一部分被植物自身消耗了，但植物消耗的氧气量远小于它们产生的氧气，因此可以推测这句话的意思应该是剩余的氧气对于动物以及其他生物体的生存是至关重要的。
excess在句中的意思是“超额的”，与extra“额外的”意思相近。
2．D从第三段的第一、二句得知，二氧化碳、氧气和水蒸气都能从气孔中通过，唯一一个没有提到的是food“养分、食物”，因此该题选D项。
3．A文章通篇都在讲Photosynthesis，即光合作頌钠作用和重要性，文章结尾又重申了Photosynthesis is essential for life on our planet，因此选A项。
B项是光合作用的一个部分，C、D项则毫不相干。
4．A文章先是介绍了进行光合作用所需的原料和组织，又介绍了光合作用的过程，因此整个逻辑应该是解释过程，而不是讲故事或比较对比。
D项是“向读者说明植物的重要性”，这确实是文章的一个目的，但不是文章的组织方式。
5．C文章的主题是光合作用的基本原理，因此选项C。
A、B项在文中有提及，但不是主旨，D项与本文无关。
理工C补全短文新增文章第五篇 A Record-Breaking RoverNASA’s Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. ____1____On July 27, after years of moving about on Martian ground, the golf-cart-sized Opportunity had driven more than 24 miles, beating the previous record holder—a Soviet rover sent to the moon in 1973.“This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,” says John Callas, the Mars Exploration Rover Project Manager.____2____ “But what is really importantly is not how many miles the rover has racked up, but how much exploration and discovery we have accomplished over that distance.”OPPORTUNITYThe solar-powered Opportunity and its twin rover, Spirit, landed on Mars 10 years ago on a mission expected to last 3 months. ____3____Spirit stopped communicating with Earth in March 2010, a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.During its mission, Opportunity has captured, and sent back to Earth, some 187,000 panoramic and microscopic images of Mars with its cameras. ____4____MARA THON ROVERThe rover doesn’t seem to be ready to stop just yet. If Opportunity can continue on, it will reach another major investigation site when its odometer hits 26.2 miles. ____5____Researchers believe that clay minerals exposed near Marathon V alley could hold clues to Mars’s a ncient environment1. Opportunity’s continuing travels will also help researche rs as they plan for an eventual human mission to the Red Planet.词汇：Mars rover n. 火星车panoramic adj. 全景的odometer n. 里程计rack up v. 积累microscopic adj. 微观的注释：1．could hold clues to Mars’s ancient environment：含有与火星早期环境有关的线索。
练习：A It has also provided sci entists with data on the planet’s atmosphere, soil, rocks, and terrain.B He works at NASA’s Jet Propulsion Laboratory in Pasadena, California.C Scientists call this site Marathon Valley, because when the rover reaches the area, it will have traveled the same distance as the length of a marathon since its arrival on Mars.D Opportunity has been working on Mars since January 2004.E The objective of the rovers was to help scientists learn more about the planet and to search for signs of life，such as the possible presence of water.F Since arriving on the Red Planet in 2004, Opportunity has traveled 25.01 miles, more than any other wheeled vehicle has on another world.答案与题解：1．F前文讲“机遇号”在距离上比之前的任何漫游车行进的距离都长，因此接下来应该讨论关于行进距离的问题。
2．B前文引入了一个新人物John Callas，而后文是他说的一些话，因此这里应该填写的内容是对这个人的进一步介绍。