俄罗斯最发达的工业区是 (  )

如图是物理教材中的两幅插图，甲图表示小铁球受磁铁的情况，说明力可以改变物体的 ____；乙图是坐在船中的人用手推另一只船时，自己坐的船同时后退，说明物体间力的作用是 ____

​

阅读短文，判断下列句子分别符合A、B、C哪一项。

    Hello! My name is Jack. I'm eleven. I'm a student. I study in the Fifteenth Primary School. I'm in Class 4, Grade 5. There are 45 students in my class. They are 22 girls and23 boys. We have English, Chinese, maths and other subjects.

    This morning I was the first one to get to school.John was the second one. Ann and Amy were the third and the fourth. We are in the same class. We have English lessons in the sixth classroom. Our classroom is on the fourth floor of our school building.