Because of the protection of our immune system, _____.
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1 .Paragraph 3_____.
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 .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
3 .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.
4 .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.
5 .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.
7 .The following is commonly known EXCEPT______.
A Megalodon, the largest shark, is extinct. B Megalodon is not extinct but just out of reach C Megalodon was 52 feet long and had a jaw 7 or more feet wide D Megalodon lived between several million years ago
8 .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.
9 .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
10 .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.
