More __3__, the saguaro cacti still persist despite the unbearable desert climate. Those that have grown to old age have __4__ droughts, freezes, flash floods, and bush fires as well as the __5__ caused by groups of rats that eat their seedlings (幼苗). Like all other desert __6__, these leafless giants can store water for use during the desert's long dry seasons by __7__ water through their long roots.
Naturally,the great saguaro cacti are a(n) __8__ part of the desert life. Actually the giants may be __9__ to many animals, including woodpeckers, owls, doves, bats and insects. In addition, after a saguaro __10__ the age of 10 or so, coldresistant flowers __11__ at the top of the plants once a year. These flowers __12__ birds, bats and bees, which come for the honey and for the tasty flowers with their black seeds.
__13__ the splendid saguaros are plentiful in the Southwest, they are unfortunately __14__. These giant cacti have great value in landscape gardening, and the thieves can earn thousands of dollars by uprooting and __15__ them to nurseries (苗圃). To protect these southwestern __16__, agents for the Arizona Department of Agriculture go around and __17__ the desert. It's a most important job though a hard one. But without the saguaro cacti, many desert animals would suffer a lack of __18__ and loss of nesting sites. The Southwest, too, would __19__ something of unique importance, since these desert giants have become a __20__ of the dry region.
【2017届高考英语外研版一轮复习课时作业:必修3 Module1《Europe》(含答案)】相关文章:
★ 2014届高考英语一轮复习课时作业(五)必修1Module 5《A Lesson in a Lab》(外研版)
★ 2014届高考英语一轮复习课时作业(三十九)选修7Module 3《Literature》(外研版)
★ 2014届高考英语一轮复习课时作业(十八)必修3Module 6《Old and New》(外研版)
★ 2014届高考英语一轮复习课时作业(十六)必修3Module 4《Sandstorms in Asia》(外研版)
★ 2014届高考英语一轮复习课时作业(四十八)选修8Module 6《The Tang Poems》(外研版)
★ 2014届高考英语一轮复习课时作业(二十八)必修5Module 4《Carnival》(外研版)
★ 【三维设计】2017版(江苏专用)二轮复习练习:必修2 Unit 1《Tales of the unexplained》课时跟踪检测A卷(含解析)
★ 2014届高考英语一轮复习课时作业(十九)必修4Module 1《Life in the Future》(外研版)
★ 2014届高考英语一轮复习课时作业(三十四)选修6Module 4《Music》(外研版)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21