【简答题】What does STEM refer to? S refers to _________, T refers to __________, E refers to _________, and M refers to _______ .
【判断题】单相半波整流电路中,如果把晶体二极管反接,则电路将发生短路事故。
【简答题】The underlined word“it”in the second paragraph refers to the idea that Computer town___
【判断题】单相半波整流电路中,如把晶体二极管反接,则电路将发生短路事故。
【单选题】In the sentence' Maybe he doesn' t see it himself' in paragraph 2, the pronoun 'it' refers to ______.