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宇宙离我们真的很遥远吗?当地时间7月11日,美国总统拜登通过社交媒体公布了韦伯空间望远镜拍摄的首张宇宙全彩色图像。 命名为“韦伯第一深场”,是人类史上首次捕捉到的宇宙全彩图。也是迄今为止最清晰的宇宙景象...
宇宙离我们真的很遥远吗?当地时间7月11日,美国总统拜登通过社交媒体公布了韦伯空间望远镜拍摄的首张宇宙全彩色图像。 命名为“韦伯第一深场”,是人类史上首次捕捉到的宇宙全彩图。也是迄今为止最清晰的宇宙景象...
Spontaneous Generation Pre-existing cells In 1852 Robert Remak made the conclusion that cells divided to form new cells, that is cells came from pre-existing cells His conclusion was reached after ...
Edexcel IGCSE Geography 复习笔记 1.3.3 Flooding - Causes & Control Causes of Flooding Flooding occurs when the capacity of the river channel is exceeded The water flows over the banks and onto ...
Edexcel IGCSE Geography 复习笔记 1.3.2 Water Quality & Supply Variations in Water Quality Clean, potable water is essential for human consumption, irrigation and for livestock Approximately one...
Practical 1: Using a Microscope Many biological structures are too small to be seen by the naked eye Optical (light) microscopes are an invaluable tool for scientists as they allow for tissues, cel...
Edexcel IGCSE Geography 复习笔记 1.3.1 Water Uses, Demand & Supply Water Uses Only 2.5% of the water on Earth is freshwater 68.7% of freshwater is stored in glaciers and ice sheets and 30% is g...
Edexcel IGCSE Geography 复习笔记 1.2.3 River Landscapes Upland Landforms River landscape characteristics The changes in river channel characteristics, lead to changes in the river landscape The upl...
Edexcel IGCSE Geography 复习笔记 1.2.2 Changes in River Characteristics Changes in River Characteristics River characteristics All rivers have a long and cross profiles Each river's long and cross ...
Edexcel IGCSE Geography 复习笔记 1.2.1 Fluvial Processes Weathering & Mass Movement River valley processes Both fluvial and landscape processes shape the river and surrounding land in the drain...
Stem Cells A stem cell is a cell that can divide (by mitosis) an unlimited number of times Each new cell (produced when a stem cell divides) has the potential to remain a stem cell or to develop in...
Edexcel IGCSE Geography 复习笔记 1.1.3 River Regime & Hydrographs River Regimes & Storm Hydrographs River regimes The discharge of a river changes over time The river regime is a record of ...
Edexcel IGCSE Geography 复习笔记 1.1.2 The Drainage Basin The Drainage Basin A drainage basin is an open system Every drainage basin is unique and is different in shape and size, with different roc...
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