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【单选题】
电子的发现并没有推翻物质是由原子、分子构成的理论,相对论力学和量子力学的提出也没有推翻经典力学。这个事实主要说明( )
A.
事物的发展有其自身的规律
B.
量变是质变的前提和必要准备
C.
感性认识是理性认识的来源和必经阶段
D.
认识是一个在实践基础上不断深化、扩展、向前推移的辩证发展过程
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参考答案：
举一反三
【判断题】低碳钢扭转破坏沿轴横截面断裂是因剪应力先达到极限所致。
A.
正确
B.
错误
查看完整题目与答案
【判断题】低碳钢扭转破坏沿轴横截面断裂是因剪应力先达到极限所致。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：W: Hi, Peter. M: Hi, Laura. W: How was your final? M: Absolutely no idea. Anyway, it's just wonderful to have finished the exam. W: Yeah, to sleep in every morning. M: Well, I've got a lot to do ...
A.
Tennis sets.
B.
Computer and TV set.
C.
Bookcase and book shelf.
D.
Refrigerator and kitchen stuff.
查看完整题目与答案
【单选题】听力原文：W: Hi, John! M: Oh! Hi, Laura! What are you doing here? W: Uh, I'm usually here on weekends. It's my dad's shop. So you are looking for a bike? M: Yeah. Now that the weather is warming up, I thin...
A.
Because she helps her father there.
B.
Because she wants to buy a bike.
C.
Because she is there to meet John.
D.
Because her bike is broken.
查看完整题目与答案
【判断题】低碳钢扭转破坏是由横截面上的切应力引起的。
A.
正确
B.
错误
查看完整题目与答案
【单选题】低碳钢试件扭转破坏是
A.
沿横截面拉断
B.
沿45度螺旋面拉断
C.
沿横截面剪断
D.
沿45度 螺旋面剪断
查看完整题目与答案
【单选题】听力原文：W: Hi, Peter. M: Hi, Laura. W: How was your final? M: Absolutely no idea. Anyway, it's just wonderful to have finished the exam. W: Yeah, to sleep in every morning. M: Well, I've got a lot to do ...
A.
Tennis sets.
B.
Computer and TV set.
C.
Bookcase and book shelf.
D.
Refrigerator and kitchen stuff.
查看完整题目与答案
【单选题】低碳钢扭转破坏的断面是（  ），铸铁扭转破坏的断面是（  ），铸铁破坏属于（   ），所以（     ）适合承受扭力。
A.
颗粒状  片状 脆断  低碳钢
B.
片状 颗粒状  脆断 低碳钢
C.
片状 颗粒状  脆断 铸铁
D.
颗粒状  片状 疲劳  低碳钢
查看完整题目与答案
【单选题】W：I have a big paper due Monday, but I promise Laura we，d clean the apartment this weekend. What am I going to do? M: Why don’t you just see if Laura can wait for a week or two? Q：What does the man su...
A.
Request one or two roommates to do the cleaning.
B.
Help Laura with her term paper due this weekend.
C.
Get Laura to clean the apartment herself this time.
D.
Ask Laura to put off the cleaning until another week.
查看完整题目与答案
【单选题】低碳钢扭转破坏的断面是
A.
横截面拉伸
B.
45°螺旋面拉断
C.
横截面剪断
D.
45 °斜面剪 断
查看完整题目与答案
相关题目：
【判断题】低碳钢扭转破坏沿轴横截面断裂是因剪应力先达到极限所致。
A.
正确
B.
错误
查看完整题目与答案
【判断题】低碳钢扭转破坏沿轴横截面断裂是因剪应力先达到极限所致。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：W: Hi, Peter. M: Hi, Laura. W: How was your final? M: Absolutely no idea. Anyway, it's just wonderful to have finished the exam. W: Yeah, to sleep in every morning. M: Well, I've got a lot to do ...
A.
Tennis sets.
B.
Computer and TV set.
C.
Bookcase and book shelf.
D.
Refrigerator and kitchen stuff.
查看完整题目与答案
【单选题】听力原文：W: Hi, John! M: Oh! Hi, Laura! What are you doing here? W: Uh, I'm usually here on weekends. It's my dad's shop. So you are looking for a bike? M: Yeah. Now that the weather is warming up, I thin...
A.
Because she helps her father there.
B.
Because she wants to buy a bike.
C.
Because she is there to meet John.
D.
Because her bike is broken.
查看完整题目与答案
【判断题】低碳钢扭转破坏是由横截面上的切应力引起的。
A.
正确
B.
错误
查看完整题目与答案
【单选题】低碳钢试件扭转破坏是
A.
沿横截面拉断
B.
沿45度螺旋面拉断
C.
沿横截面剪断
D.
沿45度 螺旋面剪断
查看完整题目与答案
【单选题】听力原文：W: Hi, Peter. M: Hi, Laura. W: How was your final? M: Absolutely no idea. Anyway, it's just wonderful to have finished the exam. W: Yeah, to sleep in every morning. M: Well, I've got a lot to do ...
A.
Tennis sets.
B.
Computer and TV set.
C.
Bookcase and book shelf.
D.
Refrigerator and kitchen stuff.
查看完整题目与答案
【单选题】低碳钢扭转破坏的断面是（  ），铸铁扭转破坏的断面是（  ），铸铁破坏属于（   ），所以（     ）适合承受扭力。
A.
颗粒状  片状 脆断  低碳钢
B.
片状 颗粒状  脆断 低碳钢
C.
片状 颗粒状  脆断 铸铁
D.
颗粒状  片状 疲劳  低碳钢
查看完整题目与答案
【单选题】W：I have a big paper due Monday, but I promise Laura we，d clean the apartment this weekend. What am I going to do? M: Why don’t you just see if Laura can wait for a week or two? Q：What does the man su...
A.
Request one or two roommates to do the cleaning.
B.
Help Laura with her term paper due this weekend.
C.
Get Laura to clean the apartment herself this time.
D.
Ask Laura to put off the cleaning until another week.
查看完整题目与答案
【单选题】低碳钢扭转破坏的断面是
A.
横截面拉伸
B.
45°螺旋面拉断
C.
横截面剪断
D.
45 °斜面剪 断
查看完整题目与答案
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