Plants in Desert
Only special plants can survive the terrible climate of a desert, for these are regions when the annual range of the soil temperature can be over 75℃. Furthermore, during the summer there are few clouds in the sky to protect plans from the sun’ s ray. Another problem is the fact that there are frequently strong winds that drive small, sharp particles of sand into the plants,earing and damaging them. The most difficult probiem for all forms of plant life, however, is the fact that the entire annual rainfall occurs during a few days or weeks in spring.
Grasses and flowers in desert survive from one year to the next by existing through the long, hot, dry season in the form of seeds. These seeds remain inactive unless the fight amount of’rain falls. If no rain falls, or if insufficient rain falls, they wait until the next year, or even still the next. Another factor that helps these plants to survive is the fact that their life cycl
A. Right
B. Wrong
C. Not mentioned
| 序号 | 项目编码 | 项目名称 | 计量单位 | 工程数量 |
| 1 | 030801002001 | 室内焊接钢管DN15螺纹连接、手工除锈．制红丹防锈漆及银粉漆各两遍 | m | 20.80 |
| 2 | 030801002002 | 查看答案
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