题干

修正液是同学们常用的一种文具,打开盖后,有刺激性的气味.我们不禁要问:修正液对人体有伤害吗?请你设计一个实验,对这个问题进行探讨.

(实验材料:修正液  小白鼠6只  老鼠的食物﹣﹣米饭  可关小白鼠的笼子)

提出问题:____

作出假设:____

设计方案:____

实验结果:____

实验结论:____

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答案(点此获取答案解析)

\u4fee\u6b63\u6db2\u5bf9\u52a8\u7269\u4f53\u6709\u4f24\u5bb3\u5417\uff1f,\u4fee\u6b63\u6db2\u5bf9\u52a8\u7269\u4f53\uff08\u6ca1\uff09\u6709\u4f24\u5bb3,\u2460\u628a6\u53ea\u5c0f\u767d\u9f20\u5e73\u5747\u5206\u6210\u4e24\u7ec4\uff0c\u7f6e\u4e8e\u7f6e

同类题2

阅读理解

      Sure, it's good to get along with your teacher because it makes that time you spend in the classroom more pleasant. And yes, it's good to get along with your teacher because, in general, it's smart to learn how to relate to the different types of people you'll meet throughout your life.

      But really, there's one super-important reason why you should get along with your teacher. Kids who get along with their teachers not only learn more, but they're more comfortable asking questions and getting extra help. This makes it easier to understand new material and do your best on tests. When you have this kind of relationship with a teacher, he or she can be someone to turn to with problems, such as problems with learning or school issues, such as bullying.

       As a kid in elementary or middle school, you're at a wonderful stage in your life. You're able to take in lots of new and exciting information. Apart from that, you're able to think about all this information in new ways. Your teacher knows that, and in most cases, he or she is thrilled to be the person who's giving you all that material and helping you put it together. Remember, teachers are people, too, and they feel great if you're open to what they're teaching you. That's why they wanted to be teachers in the first place to teach!

       Some kids may be able to learn in any situation, whether they like the teacher or not. But most kids are sensitive to the way they get along with the teacher, and if things aren't going well, they won't learn as well and won't enjoy being in class.