題目列表(包括答案和解析)
When a tornado destroys a house, it doesn’t blow it down the way a hurricane
（十二級臺風）does. It makes the house explode（爆炸）. When air that surrounds a house presses against it all time, it usually has a force of about 15 pounds per square inch. The air inside the house presses out against the walks just as hard. When a tornado passes over a house, it suddenly sucks away the air outside the house. The air inside the house still pushes out against the walls. But now there is nothing pushing back. So the walls are pushed out in an explosion. Pieces of the house are sucked up into the tornado and carried away. There is little left where the house once stood.(1) A tornado causes a house to ________.
[ ]
|
A ．explode |
B ．shake |
C ．fall down |
(2) The walls of a house stay when ________.
[ ]
A
．air pushes from the outsideB
．air pushes from the insideC
．there is a different kind of pressure(3) The air pressure outside the house is usually ________.
A
．greater than the air pressure insideB
．the same as the air pressure insideC
．less than the air pressure inside(4) The walls of a house are pushed out when ________.
[ ]
A
．the air outside is taken awayB
．the air inside is taken awayC
．too much air is pushing outside(5) A house destroyed by a tornado would look ________.
[ ]
A
．as if there had been a fireB
．like a pile of woodC
．as if a bomb（炸彈）had exploded in it湖北省互聯網違法和不良信息舉報平臺 | 網上有害信息舉報專區 | 電信詐騙舉報專區 | 涉歷史虛無主義有害信息舉報專區 | 涉企侵權舉報專區
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