对下列句子中的划线部分提问。

1. We go home once a week.

    ______ ______ ______ you go home?

2. I write my name on the book.

    ______ ______ you write on the book?

3. They go to school on foot.

    ______ ______ they go to school?

4. Tom has lunch at home.

    ______ ______ Tom ______ lunch?

喷雾水枪的雾状射流没有良好的隔绝热辐射效果和电绝缘性能。