已知点A在数轴上表示的数是-2,则与点A的距离等于3的点表示的数是______.

题型:填空题

问题:

已知点A在数轴上表示的数是-2,则与点A的距离等于3的点表示的数是______.

考点:数轴有理数减法
题型:填空题

So you’ve got an invention — you and around 39,000 others each year, according to 2002 statistics!

The 64,000-dollar question, if you have come up with a device which you believe to be the answer to the energy crisis or you’ve invented a lawnmower which cuts grass with a jet of water (not so daft, someone has invented one), is how to ensure you’re the one to reap the rewards of your ingenuity. How will all you garden shed boffins out there keep others from capitalizing on your ideas and lining their pockets at your expense

One of the first steps to protect your interest is to patent your invention. That can keep it out of the grasp of the pirates for at least the next 20 years. And for this reason inventors in their droves beat a constant trail from all over the country to the doors of an anonymous grey-fronted building just behind London’s Holborn to try and patent their devices.

The building houses the Patent Office. It’s an ant heap of corridors, offices and filing rooms—a sorting house and storage depot for one of the world’s biggest and most varied collections of technical data. Some ten million patents — English and foreign — are listed there.

File after file, catalogue after catalogue detail the brain-children of inventors down the centuries, from a 1600’s machine gun designed to fire square bullets at infidels and round ones at Christians, to present-day laser, nuclear and computer technology.

The first letters’ patent were granted as long ago as 1449 to a Flemish craftsman by the name of John Utynam. The letters, written in Latin, are still on file at the office. They were granted by King Henry Ⅵ and entitled Utynam to import into this country his knowledge of making stained glass windows in order to install such windows at Eton College.

Present-day patents procedure is a more sophisticated affair than getting a go-ahead note from the monarch. These days the strict procedures governing whether you get a patent for your revolutionary mouse-trap or solar-powered back-scratcher have been reduced to a pretty exact science.

From start to finish it will take around two and a half years and cost £ 165 for the inventor to gain patent protection for his brainchild. That’s if he’s lucky. By no means all who apply to the Patent Office, which is a branch of the Department of Trade, get a patent.

A key man at the Patent Office is Bernard Partridge, Principal Examiner (Administration), who boils down to one word the vital ingredient any inventor needs before he can hope to overcome the many hurdles in the complex procedure of obtaining a patent — "ingenuity".

What have the 1600’s machine gun and the present-day laser in common?()

A.Both were approved by the monarch.

B.Both were granted by King Henry Ⅵ.

C.Both were rejected by the Department of Trade.

D.Both were patented.

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当流体与外界交换热量过程中发生相变化时,其热负荷用潜热法计算。

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使用查询向导不可以创建( )。

A) 简单的选择查询
B) 基于一个表或查询的交叉表查询
C) 操作查询
D) 查找重复项查询

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患者,张女士,45岁,患高血压15年,昨天与人争吵后突然倒地昏迷。查体有一侧上下肢瘫痪,口角歪斜。

患者昏迷,护理措施正确的是()

A.按时给予吸痰

B.抬高床头15°

C.头偏向一侧

D.预防褥疮

E.严密观察生命体征

题型:填空题

股利支付形式有多种,目前我国企业使用最多的是()。

A.现金股利

B.实物股利

C.证券股利

D.负债股利

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