问题
选择题
| 长直螺线管中通有电流，沿螺线管中心轴线射入一电子，若螺线管中电流增大，方向不变，电子在螺线管中心轴线上运动情况是（ ） |
| A．做匀速直线运动 B．做变加速直线运动 C．做变减速直线运动 D．做间距变大的螺旋运动 |
答案
答案：A
搜题请搜索小程序“爱下问搜题”
| 长直螺线管中通有电流，沿螺线管中心轴线射入一电子，若螺线管中电流增大，方向不变，电子在螺线管中心轴线上运动情况是（ ） |
| A．做匀速直线运动 B．做变加速直线运动 C．做变减速直线运动 D．做间距变大的螺旋运动 |
答案：A
| 情景交际：用方框中所给句子完成对话。 | |
Peter: I'm hoping the report card from my son's school. Alice: It seems that you and your wife have high hopes for your son. Peter: My wife wants our son to become the top student in his grade. 2 Alice: That's because your wife wishes him to go into the best college. Peter: Yes ,but I'm afraid she's hoping too much of the child. 3 Alice: Your son is a bit worse than the best but much better than the worst. Look at my daughter, she's a clever girl ,but she never studies hard. Peter: 4 Alice: It's not to be expected. Do you know what she wants to do? She's dreaming of being a dancer. Peter: 5 |