1. Beijing is the _____________(首都) of China.

2. Here are two______________（照片）of Jim’s family.

3. There are                  （四十）students in our room.

4. My favourite sport is                （跑步）.

5. My father is a _______________(经理)

6. The little river is b____________ my house. My house is in front of it.

7.They are twin          （兄弟）.

8. Betty with Tony         (be) in Class Three.

9. The apples are                        (在…上面)the tree.

10.Our teachers are very good. We all love_______________(他们)

选用焊条或焊丝的原则是（）。

A、等强度原则

B、等同性原则

C、等条件原则

D、等电流原则