搜索优化
English
搜索
Copilot
图片
视频
地图
资讯
购物
更多
航班
旅游
酒店
笔记本
Top stories
Sports
U.S.
Local
World
Science
Technology
Entertainment
Business
More
Politics
过去 30 天
时间不限
过去 1 小时
过去 24 小时
过去 7 天
按时间排序
按相关度排序
9 天
我国科学家革新稀土开采技术:采收率超 95%、时间缩短 70%、能耗 ...
风化壳型稀土矿是我国优势矿种,为全世界提供了 90% 以上的中重稀土。然而,传统的风化壳型稀土开采工艺,铵盐原地浸取技术存在生态环境破坏严重、浸出周期长、资源利用效率低等问题,2018 年以后已被我国禁用。
一些您可能无法访问的结果已被隐去。
显示无法访问的结果
今日热点
Los Angeles wildfire updates
California fires: How to help
To go dark on Sunday
Cabinet approves Gaza deal
Court declares DACA illegal
Ex-CIA analyst pleads guilty
Fed exits climate group
To skip Trump’s inauguration
US drops corruption case
Opposes Fani Willis' bid
Vanguard fined by SEC
Senate confirmation hearing
Polar vortex to freeze US
CA battery storage plant fire
Bitcoin soars past $100K
NHTSA probing GM vehicles
Sasaki signs with Dodgers
To negotiate drug prices
FTC sues PepsiCo
Sudan army chief sanctioned
Texas abortion pill ruling
Calls for stronger sanctions
Pence advocates for Taiwan
Acting legend Plowright dies
Khan gets 14-year jail term
Liable for defaming veteran
New Pompeii excavation
Denied bail in assault case
反馈