问题
填空题
正方形的边长扩大到原来的2倍，周长扩大到原来的______倍．
答案
根据题意，假设这个正方形的边长是a，则它的周长=4a；
正方形的边长扩大了2倍，它的边长=a×2=2a，则它的周长=（2a）×4=8a；
所以8a÷4a=2，即周长扩大2倍．
故答案为：扩大2．
搜题请搜索小程序“爱下问搜题”
正方形的边长扩大到原来的2倍，周长扩大到原来的______倍．
根据题意，假设这个正方形的边长是a，则它的周长=4a；
正方形的边长扩大了2倍，它的边长=a×2=2a，则它的周长=（2a）×4=8a；
所以8a÷4a=2，即周长扩大2倍．
故答案为：扩大2．
| 阅读理解。 | |
| Your school has planned a visit to Lions Nature Education Centre. Here is what you should know about the centre. Please read it.
| |
| 1. You can visit Lions Nature Education Centre __________. | |
| A. in the city centre B. at Hiram's Highway C. on a government farm D. inside the exhibition halls | |
| 2. In the centre, visitors can learn about __________. | |
| A. rural clothes and shoes B. different kinds of seafood C. outdoor lions in nature D. the environment around us | |
| 3. Before your school go to the centre, you should tell them __________. | |
| A. not to visit the Farmers' Market B. not to make a noise or wear hats C. to care for the wildlife and water D. to look for rubbish and take it away | |
| 4. Lions Nature Education Centre is closed __________. | |
| A. at weekends B. after 4: 30 pm C. during weekdays D. before 9: 30 am | |
| 5. For more information about the centre, you'd better __________. | |
| A. call at 2792 2234 B. ask other visitors C. study the facilities D. provide the website |
