An adults heart is about 5 inches long. 1 Is an adults heart about 5 inches long?2 Is an adults heart about 5 or 6 inches long? 3 An adults heart is about 5 inches long, isn't it? 4 What is about 5 inches long? 5 How long is an adults heart? The normal heart beats about 70 times a minute. 1 Does the normal heart beat about 70 times a minute? 2 Does the normal heart beat about 70 or 80 times a minute? 3 The normal heart beats about 70 times a minute, doesn't? 4 What beats about 70 times a minute? 5 How many times a minute does the normal heart beat?
1) I knew that in the past the computer mouse looked different from what it looks now. 2) I knew that first televisions were black and white. 3) I knew that first TV's had few channels. 4) I knew that in the past TV screens were very small. 5) I do not understand how the first computer mouse was manipulated. 6) The stages of the computer mouse development. 7) The history of invention of the TV. 8) The first computer mouse was a huge wooden box 9) The first computer weighed several tons, worked very slowly and took up a lot of space. 10) First TV's had only one channel which worked for only 2 or 3 specified hours.
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