The following is commonly known EXCEPT______.
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1 .Paragraph 5_____.
A Long Existence of Bacteria B Classification of Bacteria C Vigorous vitality of Bacteria D Nature of Bacteria E Movement of Bacteria F Size of Bacteria
2 .Bacteria are so tiny that by a magnification on ordinary microscope of 100 times.
A they are heated to high temperatures B bacteria cannot always affect us and cause disease C they were put into freezers D they can hardly be seen E bacteria cannot produce disgusting smell or change the nature of the food F only some bacteria can cause disease.
3 .People may not find bacteria when eating food with bacteria for_____.
A they are heated to high temperatures B bacteria cannot always affect us and cause disease C they were put into freezers D they can hardly be seen E bacteria cannot produce disgusting smell or change the nature of the food F only some bacteria can cause disease.
4 .Bacteria can be totally destroyed only when _____.
A they are heated to high temperatures B bacteria cannot always affect us and cause disease C they were put into freezers D they can hardly be seen E bacteria cannot produce disgusting smell or change the nature of the food F only some bacteria can cause disease.
5 .Because of the protection of our immune system, _____.
A they are heated to high temperatures B bacteria cannot always affect us and cause disease C they were put into freezers D they can hardly be seen E bacteria cannot produce disgusting smell or change the nature of the food F only some bacteria can cause disease.
7 .What makes scientists doubt about the belief that Megalodon is extinct?
A The discovery of may “Living Fossils”. B The discovery of the fossils of lobsters. C The discovery of a live Coelacanth. D The discovery of the fossils of sea urchins.
8 .U.S. Navy set up underwater microphones around the world______.
A To listen for changes in ocean structure B To listen for changes of ocean currents or volcanic activity C To make sure whether there was a giant squid deep in the ocean D To follow the track of the Soviet warships under water
9 .What was special in their recorded sounds?
A A strange, powerful animal sound was heard. B A big whale’s sound was heard. C A sea monster’s sound was heard. D A giant squid’s sound was heard.
10 .What can be concluded from the passage?
A Scientists’ discoveries always change people’s belief. B There are too many secrets to be discovered. C Megalodon may be still alive deep in the ocean. D “Deep sound channel” allows sound waves to travel undisturbed.
