2.已知直线若与关于轴对称,则的方程为__________;
1.点 到直线的距离是________________.
6.若方程表示一条直线,则实数满足( )
A. B.
C. D.,,
5.直线的倾斜角和斜率分别是( )
C.,不存在 D.,不存在
4.已知,则直线通过( )
A.第一、二、三象限 B.第一、二、四象限
C.第一、三、四象限 D.第二、三、四象限
3.已知过点和的直线与直线平行,则的值为( )
A. B. C. D.
2.过点且垂直于直线 的直线方程为( )
C. D.
1.设直线的倾斜角为,且,则满足( )
75.根据中文提示和英文书信内容,写一封意思连贯、符合逻辑、不少于60词的回信。
请不要写出你的校名和姓名。开头结尾已给出,其字数不计入所完成的回信内。
我校英语校刊收到初一新生的几封来信。请选择一封来信,针对他(她)的问题,谈谈你的看法,并结合你的经历,给出可行的建议。
I just entered middle school. It is very different from primary school. Everything is new. My classmates are from different schools. I'm a little shy, and I don't know how to get on with them. What should I do?
From Lily
We've got more subjects than primary school. I'm interested in Biology. But I find math too difficult. I can't follow the teacher in class. So it takes me a long time to finish my schoolwork. I am under pressure.
From Teddy
Life in middle school is so colorful! So many activities to do, such as theatre club, sports team, singing group, dancing club... I like them all. But my mum always says, "Study first, interest second. " I'd like to borrow some advice from you.
From Bob
Dear __________ ,
I have read your letter. ______________________________________________
_____________________________________________________________________
Yours truly,
Tony
请不要在本页做答。
将回信写在另附的答题纸上,不用抄写开头和结尾。
74.我觉得现在不是完全依赖电脑的时候,因此还是有必要把字写好。
_______________________________________________to be good at handwriting.