What does the word “coaster” mean in the passage?
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1 .What is exciting about the new fuel cells?
A Their limitless power generation capacity is amazing. B Their limited power generation capacity is a good beginning. C Their limited power generation capacity is the result of great efforts. D Their limitless power generation capacity is a major accomplishment,
2 .According to the last paragraph, what is NOT true of the new fuel cells?
A The new fuel cells run on sugar that is easy to find. B The new fuel cells are environment friendly. C The new fuel cells are biologically degradable, D It will take some time before the new fuel cells can be used in popular products.
3 .Harry Potter is mentioned in the passage, because scientists_____.
A can now make an invisible cloak of the same kind as he uses B try to make an invisible cloak of the same kind as he uses C try to invent a device Similar in idea to the invisible cloak he uses D know that it is possible to make an invisible cloak of the same kind
4 .What is true of microwaves?
A Their wavelengths are shorter than those of visible light. B Their wavelengths are longer than those of visible light. C They are different from visible light as they are a kind of radiant energy. D They are visible to the human eye.
5 .What is NOT true of the invisibility device?
A It is made of a special material with unusual ability. B Microwaves bounce off it when they strike it. C Microwaves pass through it when they strike it. D It bends the microwaves all the way around until they reach the opposite side.
7 .Harry Potter’s invisibility cloak doesn’t have any real competition yet, because_____.
A scientists have not found out how his cloak works B the cloaking device is a total failure C the cloaking device works only for microwaves D the cloaking device works only for visible light
8 .Which of the following uses of nanotechnology is NOT mentioned in the passage?
A To make beauty products and dirt-resistant clothing. B To produce better and lighter building materials. C To help more accurately diagnose diseases. D To help more effectively treat diseases.
9 .How can quantum dots be used to confirm diseases?
A By traditionally looking at a person’s blood under a microscope. B By letting a person take some kind of medicine. C By lighting up in the presence of a targeted molecule. D By subjecting a person to an X-ray examination.
10 .How can nanotechnology be used to make a drug more effective?
A By making a drug target the focus of a disease. B By changing the structure of the body cells. C By lowering the side effects caused by a drug. D By letting a patient take a dose as large as possible.
