问题
填空题
从工程意义上讲，材料的破坏可分为二类，一类是脆性断裂破坏，应采用第（）或（）强度理论解释其破坏原因；另一类是（）破坏，应采用第（）或（）强度理论解释其破坏原因。
答案
参考答案：一；二；屈服流动；三；四
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从工程意义上讲，材料的破坏可分为二类，一类是脆性断裂破坏，应采用第（）或（）强度理论解释其破坏原因；另一类是（）破坏，应采用第（）或（）强度理论解释其破坏原因。
参考答案：一；二；屈服流动；三；四
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| One Sunday morning, Millie and Amy went to Sunshine Park. They love to chat there. As usual, they sat 1 a big tree. Suddenly, they heard a whistle from the bushes behind the tree. They turned around but could not see anything unusual. They were 2 . "Is 3 there?" Millie asked. Nobody answered. They 4 very carefully and heard the strange noise again. The two girls were very afraid. They ran away quickly. On their way, they met Andy. "What happened?" Andy asked. "There's a ghost in the 5 . Please help us." Millie said. "Really? Tell me more." Andy said. Millie told Andy everything. Andy went to the park, 6 beside the tree and listened carefully. Then he heard 7 noise! He looked behind the tree and heard another whisper. He was now sure the sound 8 from the bushes. He searched carefully. "Oh! Here it is." Andy said to himself. He 9 a little cat in the bushes. It was very weak. When it miaowed, 10 made a sound like a whisper. | ||||
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