阅读短文，用方框中所给词的正确形式填空，使短文通顺、连贯。方框中每词限用一次，有两个词多余。

    I'm Molly Brown, a student from New York. Every day, there are ____ terrible rules around me. In the morning, Mom's rules come—“Get up now and make your bed!”, “Don't leave your dirty dishes in the kitchen!” After that, I run to school ____ I can't be late. At school, I also have more rules ____ —don't be noisy, don't eat in class, …

    I can't play basketball after school except on weekends. Dad's rule is “You ____ do your homework.” After dinner, I have to read a book. So I can't relax, ____. No games, no TV programs, only rules, rules.

    However, Dr. Know tells me that parents and school are sometimes ____, but they make rules to help us to behave well in daily life. I believe rules are necessary.

大量事实表明，不高于36V的电压才是安全电压．当因出汗或其他因素导致双手潮湿时，人若接触较高的电压，发生危险的可能性 ____（选填“变大”或“变小”），这是因为此时人的电阻明显 ____（选填“变大”或“变小”）．  如图所示，是某商店出售的一套电源插座和插头，请你从安全用电的角度说明，该电器产品不符合安全用电规则的地方是 ____

不能用启普发生器制取的气体是（　　）