题目

（本题满分6分）如图，将矩形ABCD沿对角线AC剪开，再把△ACD沿CA方向平移得到△A1C1D1．(1)证明：△A1AD1≌△CC1B；(2)若∠ACB＝30°，试问当点C1在线段AC上的什么位置时，四边形ABC1D1是菱形. （直接写出答案）  答案：（1）∵矩形ABCD ∴BC=AD,BC∥AD∴∠DAC=∠ACB∵把△ACD沿CA方向平移得到△A1C1D1．∴∠A1=∠DAC,A1D1=AD,AA1=CC1∴∠A1=∠ACB，A1D1=CB。∴△A1AD1≌△CC1B（SAS）。……………4分（2）当C1在AC中点时四边形ABC1D1是菱形，……………6分解析:解：连接BC1∵∠CAB=60°，又∵四边形ABC1D1是菱形，∴∠BC1A=60°，∴△ABC1是等边三角   Some students think it difficult to learn English well. That's because they don't find the right way. I think reading is very important for students. The more you read,the better you’ll understand.   Reading is helpful to listening,speaking and writing. If you often read English aloud,you’ll improve your listening. On the other hand,listening a lot can help you to read better. Reading English everywhere when you are free,if you wish. You can get a lot of knowledge when you read. Sometimes you need to express your ideas,you can either speak or write. That means you are using what you learned from reading. The same as Chinese,the more you read,the better you can write. If you want to remember something,you should read again and again.   So from now on,you’d better do more reading. It's a good way to learn EngJish welJ.(江苏省盐城市景山 中学2013—2014学年八年级下学期期中考试英语试题)() 6. Some students think it difficult to learn English well because.   A. they don't work hard   B. they are afraid of English.   C. they don't find the right way   D. they aren’t clever() 7. Reading is helpful to.   A. speaking   B. listening   C. writing   D. A. B & C() 8. The writer thinks is a good way to learn English well.   A. the better you write   B. doing more reading   C. the more you remember   D. the more you write() 9. In Chinese studying,the more you read, .   A. the better you speak   B. the better you write   C. the more you remember   D. the more you write() 10. The title of this passage may be.   A. English is important   B. Reading is helpful   C. English is difficult   D. Reading is important