小测验：选择正确的单词

1. balance beam
   n. 平衡木
   
2. beam of light
   n. 光束
   
3. radio beam
   n. 无线电射线
   
4. beam balance
   杠杆式秤，杠杆式天平
   
5. beam scale
   杆秤，杆式磅秤，杆式秤
   
6. box beam
   匣形梁，箱形梁
   
7. high beam
   高光束，车前灯的远距离光束
   
8. ion beam
   离子束，离子柱
   
9. light beam
   光束，光注
   
10. particle beam
    粒子束流
    
11. tie beam
    圈梁
    
12. electron beam
    电子束
    
13. low beam
    (车头的)短焦距光
    
14. laser beam
    【化】 激光束
    

1. Her eye beamed with joy.
   她的眼睛流露出喜悦之情。
2. The sun beamed downed on the rice field.
   阳光照耀稻田
3. He probed the darkness ahead with his thin flashlight beam.
   他用手电的微弱光束探索前面的黑暗。
4. That concrete is reinforced with steel beams.
   那种混凝土由钢筋加固。
5. The Beams receive the full weight of the walls and roof.
   椽子承受着墙和屋顶的全部重量

　6个名词解释

　6个动词解释