题干

某实验小组按照课本要求探究并联电路中电流的关系,他们设计的电路如图所示。把电流表分别接入到电路中的A、B、C处,测出它们的电流,填入下表:

①根据电路图,完成连线____;

②通过对上面数据的分析,可以得出结论是:____;

③测量三次的目的是:____,在实验中我们可以采用____的方法改变电流的大小从而进行三次实验;

上一题 下一题 0.0难度 选择题 更新时间:2018-01-21 12:06:26

答案(点此获取答案解析)

,\u5e72\u8def\u7535\u6d41\u7b49\u4e8e\u5404\u652f\u8def\u7535\u6d41\u4e4b\u548c\uff08IC=IA=IB\uff09,\u6d88\u9664\u5b9e\u9a8c\u5076\u7136\u6027,\u6539\u53d8\u7535\u6e90\u7535\u538b\u503c\uff08\u6539\u7528\u4e0d\u

同类题3

用方框中所给单词的适当形式填空,(每个单词限用一次)。

feel   build  true   because   in frond of   behind   make  hard   a little   grade   sound     yes

       Is it good to be in the middle? Sometimes, no, like when you’re in the middle seat on a long car ride. But sometimes, ____, like when you’re in the middle of a great movie. What will happen next? Middle school is ____ bit like that.

     Middle school is called middle school ____  it’s in the middle of your school years. Elementary school is ____ you. High school and possibly college still await(等待) you. Middle school often includes sixth, seventh, and eighth ____, but you might go to middle school earlier or later, depending on how it's done in your area.

    For a kid, going to middle school is often a big change:

       ·First, it often means moving to a new ____, which takes some time to adjust(调整) to.

      ·Second, it may mean taking a different bus, with different students.

      ·Third, the friends you ____ in elementary school may end up going to different middle schools.

    All that can make you ____ a bit scared on the first day of school.

    Other things that probably will be different are the teachers and the work. Have you heard that middle school teachers are really mean and the homework is really, really ____? Oh, dear. We've heard those, too, but usually they’re not ____. Yes, you'll like some teachers better than others, but middle schools are not special for teachers!