名词解释：Cob 角
名词解释：Cob 角
如图，已知∠AOB是直角，∠AOC是∠COB的3倍，则∠COB是_________度．
如图，已知∠AOB是直角，∠AOC是∠COB的3倍，则∠COB是_________度．
什么是COB光源？
什么是COB光源？
COB的含义是（
COB的含义是（
什么是COB筒灯
什么是COB筒灯
COB芯片式印刷电路板
COB芯片式印刷电路板
在图中，∠COB是____。【图片】
在图中，∠COB是____。【图片】
The grains of millet spikes are mostly ( ) on the cob. A: alternated B: paired C: rotated D: spirally rotated
The grains of millet spikes are mostly ( ) on the cob. A: alternated B: paired C: rotated D: spirally rotated
The grains of millet spikes are mostly ( ) on the cob. A: alternated B: paired C: rotated D: spirally rotated
The grains of millet spikes are mostly ( ) on the cob. A: alternated B: paired C: rotated D: spirally rotated
板上芯片--封装是：COB。
板上芯片--封装是：COB。