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【简答题】
已知长为m(m>0)的线段P 1 P 2 两端点上在y 2 =4x上移动. (1)求P 1 P 2 中点M的轨迹方程; (2)求M点到y轴距离的最小值及对应点M的坐标.
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举一反三
【判断题】抗震设计时,高层建筑结构可全部采用短肢剪力墙。()
A.
正确
B.
错误
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【简答题】A: Have you made any vacation plans? B: Well, I've decided on one thing —I___ 1 ___go camping. A: That's great! For how long? B: I___ 2 ___be away for a week. I only have five days of vacation. A: So,...
【单选题】If you can make us an offer competitive price we can sell a large quantity your products our area.
A.
for; for; in
B.
at; of; in
C.
on; for; for
D.
in; for; at
【单选题】雄孔雀美丽的尾巴形成的原因在于
A.
竞争
B.
攻击
C.
性选择
D.
适应环境
【单选题】导体或半导体材料在外界力的作用下产生机械变形时,其电阻值发生相应变化的现象,称为
A.
应变效应
B.
光电效应
C.
压电效应
D.
霍尔效应
【简答题】阅读理解。 Do you like the word 'hobby' ? Do you have any hobby? Everybody has one or two or many hobbies. I'm sure for that. People have hobbies for fun. Some like to go fishing in their spare time, some ...
【单选题】一I usually go _______ with my mom on Saturdays. —Oh, you may buy a lot of things you need. [     ]
A.
fishing
B.
shopping
C.
skating
D.
bike riding
【单选题】导体或半导体材料在外界力的作用下产生机械变形时,其电阻值发生相应变化的现象,称
A.
应变效应
B.
光电效应
C.
压电效应
D.
霍尔效应
【简答题】从方框中选择恰当的选项补全对话。 A. See you then. B. May I speak to Jane, please? C. Yes, what's up? D. Yes, I'd love to. E. Are you free this afternoon? Jane: Hello! Jim: Hello! This is Jim. 1_______ Jane: Speaking....
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