求过点(1，1，2)且与直线垂直的平面的方程。_爱下问搜题

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问题问答题

求过点(1，1，2)且与直线

垂直的平面的方程。

答案

参考答案：x-2y+3z-5=0。

改错题

短文改错。
     此题要求改正所给短文中的错误。对标有题号的每一行做出判断：
     如有错误（每行只有一个错误），则按下列情况改正：
     1. 该行多一个词：把多余的词用斜线(＼)划掉，在该行右边横线上写出该词，并也用
斜线划掉。
     2. 该行缺一个词：在缺词处加一个漏字符号(^)，在该行右边的横线上写出该加的词。
     3. 该行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。

Anita Mei was very famous pop singer in Hong Kong. Together
with her mother, she began to perform in the age of four. In the
early 1980s, she took part in a local sing competition and won the
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of good friends. When SARS hits Hong Kong, she organized
several concerts with other pop stars call on Hong Kong people
to brave face the disease. Sadly, Anita died of cancer in 2003. The
brave or beautiful lady will always be remembered by people.

1. _____
2. _____
3. _____
4. _____
5. _____
6. _____
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9. _____
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问答题简答题

水库“冷害”的含义、具体表现及防止措施是什么？