用户名: 密码:  用户登录   新用户注册  忘记密码  账号激活
您的位置:教学资源网 >> 试题 >> 英语试题
高中英语编辑
溧水县2015高考英语阅读理解一轮基础练习(13)及答案
下载扣金币方式下载扣金币方式
需消耗0金币 立即下载
0个贡献点 立即下载
0个黄金点 立即下载
VIP下载通道>>>
提示:本自然月内重复下载不再扣除金币
  • 资源类别试题
    资源子类一轮复习
  • 教材版本不限
    所属学科高中英语
  • 适用年级高三年级
    适用地区全国通用
  • 文件大小631 K
    上传用户ac186186
  • 更新时间2014/7/4 8:10:36
    下载统计今日0 总计5
  • 评论(0)发表评论  报错(0)我要报错  收藏
0
0
资源简介
溧水县2015高考英语阅读理解一轮基础练习(13)及答案
【广东省广州市调研测试】
    Amazingly, scientists have just managed to do something very similar. They found the fruit of an ancient plant that had been frozen underground in Siberia — a region covering central and eastern Russia — for about 31,800 years. Using pieces of the fruit, the scientists grew plants in a lab. The new blooms have delicate white petals. They are also the oldest flowering plants that researchers have ever revived from a deep freeze.
    “This is like regenerating a dinosaur from tissues of an ancient egg,” said University of California, Los Angeles biologist Jane Shen-Miller.
    Recently, Russian scientists dug out the old squirrel hole and found the plant remains 38 meters below the surface. Back at the lab, the team fed nutrients to tissue from three of the fruits to grow shoots. Then the scientists transferred the shoots to pots filled with soil. The plants produced seeds that could be used to grow even more of them.

    It’s important for scientists to know that plant tissues can still be revived after being frozen for a long time.

  • 暂时没有相关评论

请先登录网站关闭

  忘记密码  新用户注册