【判断题】光电耦合电路的核心是光电耦合器,其结构由发光二极管和光敏三极管构成。( )
【单选题】干燥热敏性物料时,为提高干燥速率,不宜采用的措施是( )。
【单选题】_________________ was to retu rn to school .
A.
That really interested him
B.
What really interested him
C.
Which really interested him
D.
That interested him really
【单选题】干燥热敏性物料时,为提高干燥速率,不宜采用的措施是()。
【单选题】有16脚的光电耦合器,内部有( )对光电耦合器。
【单选题】去污能力较强,能快速分解蛋白质等多种有机物的清洁剂是( )
【判断题】Mr Green besides his sons like sports.
【简答题】听录音中的3个对话,写出每个对话中你所听到的拼读单词。第一段3个,第二段4个,第三段3个。每个单词首字母大写