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应力腐蚀产生的三个条件为____。

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金属在拉应力和特定化学介质作用下，经过一段时间后所产生的低应力脆性断裂现象称为（）

Ken is looking for Mr. Anderson. He meets Jane and asks her for directions. Imagine you are Jane. Tell Ken how he might find Mr. Anderson. Fill in the blanks according to the clues given in brackets. Then act it out with your partner.Ken: Jane, where is Mr. Anderson’s office?You: 1 (告诉他安德森先生的办公室在顶层，电梯旁边。)It’s on the top floor, ____.Ken: Do you think he is in?You: No. I saw him just now on the second floor. 2 (说他可能在会议室。)He might be _ .Ken: The conference room? Where is it?You: 3 (告诉他在二楼206房间。) It is on the second floor,_.Ken: Room 206. Thanks, Jane.You: 4 (礼貌回答肯的致谢。) ________________________.

金属蠕变断裂的两个机制分别是____。

金属蠕变变形的两个机制分别是____。