①它阐明了资本主义产生、发展、灭亡的规律
②它把国民财富的生产和分配作为自己的研究对象
③马克思所采取的科学方法是唯物辩证法
④它为无产阶级进行推翻资本主义制度,建设社会主义的斗争提供了强大的思想武器
A:①②
B:②③
C:①④
D:②④
34x =15
x=____
A
B
C
D
测定空气中氧气
含量
比较MnO2和Fe2O3
的催化效果
收集氧气并测量
氧气的体积
探究可燃物燃烧的
条件
____
( A )
Report Card
Name: James Smith
Time: January 24th, 2015
Subjects
Grades
Comments(评语)
English
B+
Your reading and writing are good. But you have a strong accent(口音), so you are not good at speaking. And you do not put much effort into this subject. If you work hard, you can get a better grade in this subject.
Physics
A+
You are good at this subject. You are hardworking. I am glad that you do best in this subject.
Math
You like this subject. But you are not good at this subject because you are a little lazy. It is disappointing.You can do better if you try your best.
Music
It is a happy thing to hear you play the piano. You are crazy about music. Although you like this subject best, your accent has a bad influence on your singing.
阅读以上成绩单,根据表格内容完成以下问题
用竖式计算。(最后一小题要验算)
522÷4= 413÷7= 504÷5=
263÷3= 326÷5= 439÷7=