6

　　，these leafless giants can store water for use during the desert’s long dry season 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

【2017届高考英语（全国）复习练习题：加练半小时 第17练 自然与环保类（3）（含答案）】相关文章：

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练：8（含解析）

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（12）附答案

★ 2014届高考英语一轮复习课时作业(九)必修2Module 3《Music》（外研版）

★ 常熟市2014高考英阅读理解语一轮（暑假）训练题（1）及答案

★ 2017届高考英语二轮复习课时训练：22（含解析）

★ 2014高考英语（新人教版）一轮基础训练（11）A、B卷（附答案或解析）

★ 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）

★ 重庆市2014高考英语阅读理解一轮（精品）训练题（13）附答案

★ 2017届高考英语二轮复习课时训练：5（含解析）

★ 2014高考英语（新人教版）一轮基础训练（17）A、B卷（附答案或解析）