【单选题】Though in a big city,the college student was more interested in village life.
【判断题】实验室的药品和设备一定要标明其名称,以免误用。()
【单选题】设(7,4)分组码中,用S1、S2、S3表示3个监督关系式中的校正子,规定S1、S2、S3的值与错码位置的对应关系如下表所列,则监督关系式S1、S2、S3应为( )。
A.
S 1 =a 6 ⊕ a 5 ⊕ a 4 ⊕ a 2 , S 2 =a 6 ⊕ a 5 ⊕ a 3 ⊕ a 1 , S 3 =a 6 ⊕ a 4 ⊕ a 3 ⊕ a 0
B.
S 1 =a 6 ⊕ a 5 ⊕ a 4 ⊕ a 3 , S 2 =a 6 ⊕ a 5 ⊕ a 2 ⊕ a 1 , S 3 =a 6 ⊕ a 4 ⊕ a 2 ⊕ a 0
C.
S 1 =a 5 ⊕ a 4 ⊕ a 3 ⊕ a 1 , S 2 =a 6 ⊕ a 4 ⊕ a 3 ⊕ a 2 , S 3 =a 6 ⊕ a 5 ⊕ a 4 ⊕ a 1
D.
S 1 =a 5 ⊕ a 4 ⊕ a 2 ⊕ a 0 , S 2 =a 6 ⊕ a 3 ⊕ a 2 ⊕ a 0 , S 3 =a 6 ⊕ a 4 ⊕ a 3 ⊕ a 0
【判断题】商务宴请时,可专门挑选自己喜欢的东西吃,不考虑他人感受。
【简答题】与其他促销方式相比,营业推广具有的特点是什么?