精英家教网 > 试题搜索列表 >点O为坐标原点,四边形OABC为长方形,A(10,0),C(0,4),点D是OA的中点,点P在BC上运动,当三角形ODP是腰长为5的等腰三角形时,则P点的坐标为

点O为坐标原点,四边形OABC为长方形,A(10,0),C(0,4),点D是OA的中点,点P在BC上运动,当三角形ODP是腰长为5的等腰三角形时,则P点的坐标为答案解析

科目:czyy 来源:同步题 题型:填空题

选用所给的词填空(注意句首的第一个字母要大写)。
  
  how, am, are, his, your, her, my, is, an, what
1. She is a student and _____name is Maria. 
2. Wang Hong,this is _____bag. Here you are. 
3. Where is _____eraser? I can't find it. 
4. Peter is English. Mr Zhang is _____Chinese teacher. 
5. Excuse me! _____this your gold ring? 
6. _____you Lucy? Yes,I am. 
7. This is _____old watch. 
8. I _____a Chinese boy. 
9. _____is that in English? It's a watch. 
10. _____do you spell computer? C-O-M-P-U-T-E-R.

查看答案和解析>>

科目:czyy 来源:同步题 题型:填空题

从方框内选出恰当的单词完成句子。
how,  am,  are,  his,  your,  her,  my,  is,  an,  what,  a
1. My sister is a student and _____ name is Maria.
2. Wang Hong, this is _____ pencil case. Here you are.
3. Where is _____ new ring?I can't find it.
4. Peter is a boy. Mr Zhang is _____ math teacher.
5. Excuse me! _____ this your backpack?
6. — _____ you Nancy? —Yes, I am.
7. This is _____ old watch.
8. I _____ an English girl.
9. —_____ is that in English? —It's a watch.
10. —_____ do you spell "computer"?
     —C-O-M-P-U-T-E-R.

查看答案和解析>>

科目:czyy 来源:北京市东城区2011年中考一模英语试题 题型:016

It’s twelve o’clock.It’s time ________ lunch.

[  ]
A.

have

B.

to have

C.

had

D.

having

查看答案和解析>>

科目:czyy 来源:同步题 题型:填空题

选用所给的词填空(注意句首的第一个字母要大写)。
       how, am, are, his, your, her, my, is, an, what

1.She is a student and ________ name is Maria.
2.Wang Hong,this is ________ bag. Here you are.
3.Where is ________ eraser? I can't find it.
4.Peter is English. Mr Zhang is ________ Chinese teacher.
5.Excuse me! ________ this your gold ring?
6.________ you Lucy? Yes,I am.
7.This is ________ old watch.
8.I ________ a Chinese boy.
9.________ is that in English? It's a watch.
10.________ do you spell computer? C-O-M-P-U-T-E-R.

查看答案和解析>>

科目:czyy 来源: 题型:

如图所示,x轴正方向水平向右,y轴正方向竖直向上。在xOy平面内有与y轴平行的匀强电场,在半径为R的圆内还有与xOy平面垂直的匀强磁场。在圆的左边放置一带电微粒发射装置,它沿x轴正方向发射出一束具有相同质量m、电荷量qq>0)和初速度v的带电微粒。发射时,这束带电微粒分布在0<y<2R的区间内。已知重力加速度大小为g
(1)从A点射出的带电微粒平行于x轴从C点进入有磁场区域,并从坐标原点O沿y轴负方向离开,求电场强度和磁感应强度的大小与方向。
(2)请指出这束带电微粒与x轴相交的区域,并说明理由。
(3)若这束带电微粒初速度变为2v,那么它们与x轴相交的区域又在哪里?并说明理由。

查看答案和解析>>

科目:czyy 来源: 题型:

在物理学中,磁场的强弱用磁感应强度(用字母B表示,国际单位是特斯拉,符号是T)来表示,磁感线越密的地方,磁场越强,磁感应强度B越大.

(1)在图20中,甲为某磁极附近磁感线的方向和分布的示意图,由图可知,该磁极为 ▲ 极,若在l处放置一个小磁针,当小磁针静止时,其指向应是图乙中的  ▲   .
(2)磁敏电阻阻值的大小随磁场的强弱变化而变,图丁是某磁敏电阻R的阻值随磁感应强度B变化的图象,据图线可知,磁敏电阻的阻值随磁感应强度B的增大而▲ .图线没有过坐标原点,说明  ▲  .
(3)王强设计了一个可以测量该磁敏电阻R的电路如图丙所示,(其中磁敏电阻所处的磁场未画出).将该磁敏电阻R放置在磁场中的位置某处,测出电阻后,利用R—B特性曲线可以读出相应的磁感应强度.
①在图甲磁场中1处,测得的数据如图20表中所示,则该磁敏电阻的测量值为 ▲ Ω. 
②根据该磁敏电阻的R-B特性曲线可知,1处的磁感应强度为   ▲    T.
③在实验过程中,仅将磁敏电阻从1处移至2处,其它条件不变,那么电流表的示数
▲   (填“增大”、“减小”或“不变”).
④依据上述方法获得的磁感应强度B的测量值与该点实际值存在不小的误差,为尽可能准确反映空间某点磁场的强弱,你认为在选择磁敏电阻时应注意什么问题?

查看答案和解析>>

科目:czyy 来源: 题型:

为坐标原点,点M坐标为,若点满足不等式组:则使取得最大值的点的个数是(   )
A.B.C.D.无数个

查看答案和解析>>

科目:czyy 来源: 题型:

如图,直线AB、CD相交于点O,OEAB,O为垂足,如果EOD=35°,则COB=       

查看答案和解析>>

科目:czyy 来源: 题型:

如图:探照灯、锅形天线、汽车灯以及其它很多灯具都与抛物线形状有关,如图所示是一探照灯灯碗的纵剖面,从位于点的灯泡发出的两束光线经灯碗反射以后平行射出。如果图中,则的度数为(  )
A.B.C.D.

查看答案和解析>>

科目:czyy 来源:2011年辽宁省大连市中考英语试卷 题型:其他题

根据对话内容,从所给的七个选项中选出可以填入空白处的最佳选项,使对话内容完整。(有两项为多余选项)

A: Hi, Katy speaking.

B: Hi, Katy. It' s Betty.   1.

A: Yes, I' d love to.   2.

B: It's about animals in danger, and what the government is doing to protect them;

A:  3.   Do we need to buy tickets in advance(提前)?

B: I'm not sure.

A: Well,   4.  .

B: At five o' clock. So let' s meet half an hour earlier to see if there are still tickets left.

A: OK.   5.        

B: see you.  

A. See you then.

B. Enjoy yourself.

C. What is it about?

D. Do you like Beijing Zoo?

E. Oh, that rounds interesting.

F. What time does the film start?

G. Would you like to see a film tonight?

 

 

查看答案和解析>>

科目:czyy 来源: 题型:

根据对话内容,从所给的七个选项中选出可以填入空白处的最佳选项,使对话内容完整。(有两项为多余选项)
A: Hi, Katy speaking.
B: Hi, Katy. It' s Betty.   【小题1】
A: Yes, I' d love to.   【小题2】
B: It's about animals in danger, and what the government is doing to protect them;
A:  【小题3】  Do we need to buy tickets in advance(提前)?
B: I'm not sure.
A: Well,   【小题4】  .
B: At five o' clock. So let' s meet half an hour earlier to see if there are still tickets left.
A: OK.   【小题5】       
B: see you.  
A.See you then.
B.Enjoy yourself.
C.What is it about?
D.Do you like Beijing Zoo?
E. Oh, that rounds interesting.
F. What time does the film start?
G. Would you like to see a film tonight?
 

查看答案和解析>>

科目:czyy 来源:2016届湖南怀化怀信学校七年级第一学期期中考试英语试卷(解析版) 题型:翻译

按所给的汉语,用英语完成下列句子,每空限填一词。 

1.是时候为晚会做准备了。

It’s time _________ _________ _________ _________ the party.

2. 慢走使我们强壮。

 Jogging _________ _________ _________.

3.大多数超市早上9点到晚上10点营业。

Most supermarkets _____ ____ _________ _________ 9:00 a.m. ________ 10:00 p.m.

4. 他希望成为游泳俱乐部的成员。

He ________ _________ _________ a _________ ________ the Swimming Club.

5.格林太太没有很多时间练习打网球。

Mrs. Green doesn’t have much _________ _________ __________ _________ tennis.

 

查看答案和解析>>

科目:czyy 来源:2012-2013学年福建仙游县枫江中学七年级上学期期末考试英语卷(带解析) 题型:阅读理解

Henry’s family has a picnic on the weekend.They ask their friends,Nancy and her husband(丈夫),to go with them.On Sunday morning,Henry’s wife(妻子),Kate,gets up early to get ready for(为…作准备)some food for the picnic.At nine o’clock in the morning,Nancy calls and tells Henry she would like to bring something to the picnic.Kate calls her back and asks her to bring a big bottle of orange juice.The two families go to a park near Nancy’s house.There are tables and chairs under the trees near the river(河).They can see the blue sky and green water there.Everyone likes the picnic and they have a nice Sunday afternoon in the park.
【小题1】There are(有) ___________people in the passage.

A.threeB.fourC.fiveD.six
【小题2】_______ brings a big bottle of orange juice to the picnic.
A.NancyB.HenryC.Nancy and KateD.Kate’s husband
【小题3】______ are near the river.
A.Some flowersB.Some beds C.Some children D.Some trees
【小题4】They have the picnic______.
A.before 12 o’clockB.on the Sunday morning
C.on a rainy(有雨的) dayD.on the Sunday afternoon
【小题5】Which of these is right?
A.The park is near Henry and Kate’s house.
B.At 9 o’clock in the morning,Nancy calls Kate.
C.They don’t like the picnic.
D.From the passage,we can’t know Nancy’s husband’s name.

查看答案和解析>>

科目:czyy 来源:辽宁省大连市2011年初中毕业升学考试英语试卷 题型:053

根据对话内容,从所给的七个选项中选出可以填入空白处的最佳选项,使对话内容完整。(有两项为多余选项)

A:Hi, Katy speaking.

B:Hi, Katy.It' s Betty.  1  

A:Yes, I' d love to.  2  

B:It's about animals in danger, and what the government is doing to protect them;

A:  3   Do we need to buy tickets in advance(提前)?

B:I'm not sure.

A:Well,   4  

B:At five o' clock.So let' s meet half an hour earlier to see if there are still tickets left.

A:OK.  5  

B:see you.

查看答案和解析>>

科目:czyy 来源:69领航·单元同步训练  八年级英语(EEC) 题型:030

从方框内A~G选项中选出能填入空白处的最佳选项,补全对话(有两项为多余选项)

A:  1   Kate?

B:I'm going swimming with my friend.

A:  2   I hope you'll take your raincoat with you.

B:Yes,   3  

A:The radio says it'll rain this afternoon.   4   what time will you come back?

B:At about five o'clock.   5   I won't get home late.

1.________  2.________  3.________  4.________  5.________

查看答案和解析>>

科目:czyy 来源: 题型:053

Read the passage and fill in the blanks with the proper words.

What is e-mail?

  Electronic mail (e-mail) is a way of s_________ messages to

o__________ people. It's much q__________ and cheaper than sending a letter.

  If you want to use e-mail, you must have an e-mail a__________. This address must have letters and dots(点)and an@(meaning 'at'). This is what an address looks like:Emily @ star. net write a message, type in the person's e-mail address, then send the message a__________ the Internet. People don't need to use s___________, envelopes or go to the post office since the invention of the Internet. Quick, easy and interesting -- that's the Internet!

查看答案和解析>>

科目:czyy 来源: 题型:030

根据对话内容,从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

A: ___1___

B: I like playing table tennis. ___2___

C: Yes, but I can't play well.

B: Would you like to play with me tomorrow morning?

A: ___3___ But 1 am afraid I can't play as well as you.

B: ___4___ Anyway you know practice makes perfect.

A: Well, how about at eight o' clock?

B: Oh, You won' t forget to bring a ball, will you?

A: ___5___

B: So long.

A: Bye.

A. What do you think of that sport?

B. Certainly.

C. Of course, not.

D. What's your favourite sport?

E. De you like it?

F. Are you free?

G. Never mind.

查看答案和解析>>

科目:czyy 来源:山东省高青县2011-2012学年七年级上学期期中考试英语试题 题型:019

元音字母为________

[  ]
A.

a b c d f

B.

a e o u c

C.

a e i o u

D.

o i u e d

查看答案和解析>>

科目:czyy 来源:初中二年级上(册) 69领航·单元同步训练 英语 题型:030

从方框内A~G选项中选出能填入空白处的最佳选项,补全对话(有两项为多余选项)

A:  1   Kate?

B:I’m going swimming with my friend.

A:  2   I hope you’ll take your raincoat with you.

B:Yes,   3  

A:The radio says it’ll rain this afternoon.   4   what time will

you come back?

B:At about five o’clock.   5   I won’t get home late.

1.________  2.________  3.________  4.________  5.________

查看答案和解析>>

科目:czyy 来源:辽宁省中考真题 题型:补全对话,情景问答

     对话内容,从所给的七个选项中选出可以填入空白处的最佳选项,使对话内容完整。(两项为多
余选项)
A: Hi, Katy speaking.
B: Hi, Katy. It's Betty. 1________
A: Yes, I' d love to. 2________
B: It's about animals in danger, and what the government is doing to protect them;
A: 48 Do we need to buy tickets in advance (提前)?
B: I'm not sure.
A: Well, 3________
B: At five o' clock. So let' s meet half an hour earlier to see if there are still tickets left.
A: OK. 4________
B: see you.
A. See you then.
B. Enjoy yourself.
C. What is it about?
D. Do you like Beijing Zoo?
E. Oh, that rounds interesting.
F. What time does the film start?
G. Would you like to see a film tonight?

查看答案和解析>>