变压器可将某一种电压、电流的交流电能变成()相同的另一种电压、电流。
参考答案:频率
用所给单词的正确形式填空。
1. Let's _______ (look) inside the window.
2. May I help you _______ (take) a picture?
3. It's about five hundred _______ (year) old.
4. The people are _______ (quiet). They sit _______ (quiet).
5. The children are _______ (loud). They talk _______ (loud).
6. I can find the children _______ (play) football.
7. Some _______ (child) are singing songs.
8. I want to take _______ (I) camera.
在某市开展的“我为创建文明城市献一计”活动中,广大市民纷纷建言献策。不到半年时间,市政府就收到四千多条建议。经过认真研究,很多合理的建议被采纳。这表明公民参与民主决策的方式是[ ]
A、专家咨询制度
B、社情民意反映制度
C、社会听证制度
D、重大事项社会公示制度