问题
选择题
| —I went to the park yesterday morning. — _______. But we didn't see you. |
A. So did we B. So we did C. Neither were we D. Neither we were. |
答案
答案：A
搜题请搜索小程序“爱下问搜题”
| —I went to the park yesterday morning. — _______. But we didn't see you. |
A. So did we B. So we did C. Neither were we D. Neither we were. |
答案：A
，波长
，周期
求：
时，PQ之间的波形图（把图画在答题卷的相应位置）
