EVery year the U.S receives tens of thousands of inventiona. Of these only a few become_____A. useful B complete C popular 该选哪一个/

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EVery year the U.S receives tens of thousands of inventiona. Of these only a few become_____A. useful B complete C popular 该选哪一个/
EVery year the U.S receives tens of thousands of inventiona. Of these only a few become_____
A. useful B complete C popular 该选哪一个/

EVery year the U.S receives tens of thousands of inventiona. Of these only a few become_____A. useful B complete C popular 该选哪一个/
C

DDDDDD

C
Every year the U.S. receives tens of thousands of inventions. Of these only a few become popular and make a lot of money. There are thousands of inventions that nobody wants.
Here are som...

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C
Every year the U.S. receives tens of thousands of inventions. Of these only a few become popular and make a lot of money. There are thousands of inventions that nobody wants.
Here are some of those.
In 1879, somebody invented a new type of “fire escape”. This was a hat which had a parachute on top. You connected the hat with a strap under your chin. With this special hat you could jump from a building on fire and flew safely down. With it there was also a special pair of shoes, so the person landed safely.
There was a special alarm clock for people who had trouble in waking up in the morning. This clock had six pieces of wood that hung above your head. At the right time the pieces of wood dropped down on you when you were sleeping. They hit you but did not hurt you. Therefore, you woke up.
Another invention was the bicycle seat to stop a thief. This seat had needles in it. When the owner rode the bicycle, the needles were down But when the bicycle was not in use, the needles were up. So a thief who jumped on the bike got a nice surprise!
每年美国会产生数以万计的发明.
在这些发明中,只有少数能够成名并赚大钱.
还有几千个发明根本没有人想要.
这里就是一些例子:
1879年,有人发明了一种新型"火灾逃生器",这是一种头顶上有降落伞的帽子,你得用一根绳子把它拴在你的下巴上.用这个奇特的帽子,你就可以从一幢着火的房子里跳出来,安全地飞到地上来.这帽子还附带一双特制的鞋子,这样人可以安全着陆.
有一种特殊的闹钟,是为那些早上很难叫醒的人准备的.这个钟有六片木头挂在你的脑袋上方,等到时间到了,这些木头就会掉下来砸在正在睡觉的你头上.这会很痛,但不会伤害到你.这样,你就会醒来了.
还有一个发明是一种防贼自行车坐垫.这个坐垫里藏着针,当车主骑车的时候,针会平放收起来,但当车闲置的时候,这些针就会立起来.这样,要是有个毛贼跳上了这辆自行车,他就会得到一个愉快的惊喜!~

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