如果线路送出有功和受进无功相等，则线路电流、电压相位关系为电流（）电压45°。
参考答案：超前
（）处于“信息加工金字塔”的顶端。
根据句意和汉语，提示写出单词。
1. We often have some ________ (活动) after school.
2. We are ________ (放松的) on weekends.
3. Every evening we take a walk ________ (穿过) the park.
4. I want a ________ (棕色) sweater, please.
5. I have a pen pal from ________ (澳大利亚).
6. Please ________ (讨论) this question with your classmates.
7. Do you like soup operas or ________ (情景) comedies?
8. We cannot speak ________ (大声) in the reading room.
