将1W的信号功率输入到3dB耦合器中，在忽略插损的情况下，直通端口输出功率为（）.
参考答案：27DBM
其结果可判定为阴性者为：
A．水痘B．传染性软疣C．扁平疣D．天疱疮E．带状疱疹
根据句意和首字母完成句子。
1. Let's go up the m______, I want to get the top first.
2. They can run very f______.
3. These animals are our f______.
4. We shouldn't w______ too much water.
5. Please turn off the light w______ leave the room.
