【单选题】在用数字万用表测量电压和电阻时红表笔插入 V·Ω插孔,黑表笔应插入( )插孔。
【判断题】设x、y、z和k都是int型变量,则执行表达式:x=(y=2,z=4,k=6) 后,x的值为4
【单选题】使用数字式万用表测量继电器的线圈电阻时红黑表笔应该点在继电器的那两只触点上?
【多选题】可能检出trophozoite of Entamoeba histolytica的标本是:
【单选题】The classmates are all _____ to each other.
【简答题】通过测量判断二极管的正负极时,选用 表的 档位 R*100OΩ或R*1KΩ 的量程,用红黑两个表笔分别放在二极管两个电极上测电阻,两次阻值一大一小,其中阻值小的一次,模拟万用表 表笔对应二极管的正极,数字万用表 表笔对应二极管正极。
【单选题】设x 、y 、z 、t均为int型变量,则执行以下语句后,t的值为_______. x=y=z=6; t=++x || ++y && ++z;
【简答题】You and your classmates are going to have a party to celebrate the end of your course and you have offered to book a room for this . You have seen the advertisement below, but you need to know mo...
【简答题】( ) 1. The instructor is asking a student a question. ( ) 2. The student is answering the instructor’s question. ( ) 3. Two classmates are talking together. ( ) 4. Two classmates are looking a...
【判断题】数字万用表在测量电阻档时,红表笔带正电,黑表笔为负极,而指针式万用表则相反。在测量晶体管、电解电容器等有极性的元器件时,必须注意表笔的极性。