教学研究的第一步是( )。
A.研究方法的设计 B.研究课题的选择C.研究方案的实施 D.论文和报告的撰写
参考答案:B
解析: 教学研究的第一步是研究课题的选择。
改错。
1. A personal computer has bought by us.
____________________________________________________________
2. Many problems has been found with our new computer.
5. The computer was used every day since we bought it.
4. It's said that this book has translated into Chinese.
5. The new theater has been designing recently.
两个数之和为一组的数是按下面顺序及规律排列的:
(1+1)(2+3)(3+5)(1+7)(2+9)(3+11)(1+13)(2+15)(3+17)(1+19)…,那么,第2003组数是______.