问题
填空题
| 写出下列单词的过去式形式。 | ||
|
答案
1. brought 2. ate 3. went 4. helped 5. played 6. saw 7. worked 8. talked 9. jumped 10. pointed
搜题请搜索小程序“爱下问搜题”
| 写出下列单词的过去式形式。 | ||
|
1. brought 2. ate 3. went 4. helped 5. played 6. saw 7. worked 8. talked 9. jumped 10. pointed
，写出每一实验鉴定离子的结论与理由。