已知，如图，D是△ABC的BC边的中点，DE⊥AC，DF⊥AB，垂足分别是E、F，且BF=CE，求证：（1）△ABC是等腰三角形；（2）当∠A=90°时，试判断四边形AFDE是怎样的四边形，证明你的结论。

如图所示，四边形ABCD是正方形，点E是边BC的中点且∠AEF=90°，EF交正方形外角平分线CF于点F，取边AB的中点G，连接EG.（1）求证：EG=CF；（2）将△ECF绕点E逆时针旋转90°，请在图中直接画出旋转后的图形，并指出旋转后CF与EG的位置关系.

补全对话
A: Hi, Sand, what are you going to do this weekend?
B: I’m going to see a movie. Can you give me some advice?
A: Sure.1                ?
B: I like action movies.
A:Have you ever seen the movie Avatar（阿凡达）？
B：2                 .But I heard it is great.
A: Oh, I saw it yesterday.
B: 3                ?
A: I think it is the best movie I have seen.
B: 4                ?
A: It lasts about two and a half hours.
B: Is the ticket price high?
A: Yes. Watching it in 3D costs 120 yuan.
B: 5                   .
A: You’re welcome.

补全对话
A: Good afternoon, Tom. Where are you going?
B: 1             .
A: Oh, to buy books? You are out! Why not go to the Readers' Room?
B: The Readers' Room? 2                .
A: It is a place where students can exchange their old books with others.
B: That sounds great! 3               .
A: It's next to Renmin Hospital, across from City Park.
B: Oh, it's a little far. 4                .
A: You can take No. 7 bus.
B: How long does it take?
A: 5               .
B: Ten minutes isn't a long time. OK, I will go there. Thanks!

补全对话
A: Hi，David!1          ? ?
B: Hi，Sarah! I am going to see Anna. She is in hospital.?
A: 2        ?
B: She had a traffic accident on her way to school and was hurt.?
A: 3         . Is there anything serious??
B: Yes, there is something wrong with her head.?
A: Oh, my God! 4         . ?
B: I hope so, too.?
A: 5            ? ?
B: Sure. Let’s go!?

从下列句子中选择合适的句子，填到横线上
Shopkeeper: 1                .
Tim: Hello, I’m looking for a pair of football boots for my father.
Shopkeeper: Which color do you like?
Tim: I like the red ones.2                 .
Shopkeeper: They’re 150 yuan.
Tim: Oh! 3               .How about the blue ones?
Shopkeeper: 140 yuan.
Tim: Also too expensive, 4              .
Shopkeeper: Yes, the white boots cost only 100 yuan .And they’re good.
Tim: Let me see.5              .

A. Are there any cheaper ones?
B. How much do they cost?
C. They’re too expensive.
D. I will take the white ones.
E. How much is it?
F. Hello, can I help you?

从下列句子中选择合适的句子，填到横线上
W: Hello, this is Sally speaking.
M: Hello, this is Bob.
W: 1                
M: Reading a book.
W: 2                    we can watch a video.
M: OK. 3               
W: Go along Peace Street. When you get to the second traffic lights, turn left. At the end of the street, you'll see a new hotel.
M: Oh, OK. I know where that is. 4             
W: Yes. My house is across from the supermarket.
M: OK. 5                

A. How can I get to your house?
B. There's a small supermarket next to the hotel.
C. It's on the right.
D. Do you want to come over to my house?
E. What do you do?
F. What are you doing?
G. I'll see you at two thirty.

某厂有甲、乙两组共同生产某种产品．若甲组先生产1天，然后两组又一起生产了5天，则两组产量一样多．若甲组先生产了300个产品，然后两组同时生产4天，则乙组比甲组多生产100个产品．两组一天各生产多少个产品？

小明和小亮做加法游戏．小明在一个加数后面多写了一个0，得到的和为242；而小亮在另一个加数后面多写了一个0，得到的和为341．原来两个加数分别是多少？

某旅馆的客房有三人间和两人间两种，三人间每人每天25元，两人间每人每天35元．一个50人的旅游团到该旅馆住宿，租住了若干客房，且每个客房正好住满，一天共花去住宿费1510元．两种客房各租住了多少间？