How do we know the time? A clock, a watch or a mobile phone can help us. However, many years ago there were no clocks and knowing the time was not so easy. Over the centuries people have developed different ways of telling the tim e.About 5,500 years ago, the Egyptians invented th...
How do we know the time? A clock, a watch or a cell phone can help us. However many years ago there were no clocks and knowing the time was not so easy. Over the centuries people have developed different w of telling the time. About 5,500 years ago, the Egyptians i the sun clock...
How do we know the time? A clock, a watch or a cell phone can help us. However many years ago there were no clocks and knowing the time was not so easy. Over the centuries people have developed different w1.of telling the time. ...
So people were able to know midday. The Egyptians made a sundial about 3, 500 years ago. It was smaller than the sun clock and could let people know the time for half a day. On cloudy days or at night it was impossible to tell the time with a sun clock or a sundial. Water ...
How do we know the time? A clock, a watch or a mobile phone can help us. However, many years ago there were no clocks and knowing the time was not so easy. Over the centuries people have developed different ways of telling the time. ...
How do we know the time? A clock, a watch or a cellphone can help us. However many years ago there were no clocks and knowing the time was not so easy.Over the centuries people have developed different w 1 o f telling the time.About 5,500 years ago, the Egyptians i 2 the sun ...
根据“Later, the first quartz clock (石英) was developed. Clocks became cheaper to build.”可知,石英钟的制作成本更低,因此更便宜。 故填The quartz clock. (4)题详解: 根据“On cloudy days or at night it was impossible to tell the time with a sun clock or a sundial.”可知,由于日晷和太...
How do we know the time? A clock, a watch or a cell phone can help us. However many years ago there were no clocks and knowing the time was not so easy. Over the centuries people have developed different w【1】of telling the time. ...
How do we know the time? A clock, a watch or a mobile phone can help us. However, many years ago there were no clocks, so knowing the time was not so easy. Over the centuries, people have developed different ways of telling the time. About 5,500 years ago, the Egyptians invented ...
How do we know the time? A clock, a watch or a mobile phone can help us. However, many years ago there were no clocks and knowing the time was not so easy. Over the centuries people have developed different ways of telling the time. About 5,500 years ago, the Egyptians invented ...