命题“同角的补角相等”的题设是______，结论是______，这个命题是____爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

命题“同角的补角相等”的题设是______，结论是______，这个命题是______的命题（填“正确”或“错误”）

答案

命题中，已知的事项是“两个角是同一个角的补角”，由已知事项推出的事项是“这两个角相等”，

所以“两个角是同一个角的补角”是命题的题设部分，“这两个角相等”是命题的结论部分．

故答案为：两个角是同一个角的补角，这两个角相等，正确．

阅读理解

阅读上面的材料, 完成下列句子。( 每空一词)

Here are reports of three attacks (攻击). Three swimmers were attacked by sharks (鲨鱼) because
they didn't obey (遵守) the safety rules for swimmers.

Rules for swimmers:
1. Don't swim at night.
2. You are more likely to be attacked in warm water.
3. Sharks are attacking by blood (血). Don't swim with an open cut(划口).
4. It's best to wear a swimming suit to match (与……相配) your skin colour. Sharks can see colours.
5. If you see a shark, don't be nervous. Try to swim quietly, with even (平稳的) strokes (划水动作).

     Report 1: Colin was swimming with two friends very late at night. He was attacked by a shark and
died.
     Report 2: Ann was a very good swimmer. She bought a new bright red swimming suit. She was
swimming with some friends when a shark attacked her.
     Report 3: Jack was on holiday in Australia. He cut his foot on the beach. He went swimming the
same day and got attacked.

1. Colin was attacked by a shark and died because he was swimming with two friends very
late at ________.
2. It's not a good idea to wear a ________ red swimming suit like Ann, because sharks can see colours.
3. You mustn't go swimming with an open _________.
4. If you see a shark, try to swim ________, with even strokes.
5. You can be _________ only if (只要) you obey the safety rules for swimmers.

填空题

非提速滚动轴承轮对车轮踏面2处剥离，每处长度不大于（）。