国民党一大在事实上确立了联俄、联共、扶助农工的三大革命政策。
参考答案：对
磁场感应强度B为（）。
A.IN
B.
C.NI
D.
用适当的介词和副词填空。
1. We did a survey ____ our readers.
2. We won the prize ____ the funniest performance.
3. Our teacher is very friendly ____ us.
4. I'm going to work ____ the English project.
5. Can you count ____ one to a hundred?
6. The boy often hangs ____ with his friend.
7. He took some of his old things ____ the yard.
8. What did you have ____ breakfast?
