問題文
A statistics office is writing a short glossary for the staff who prepare public files. Two entries have to be told apart: one names the step that severs the tie between a row and the person it came from, and the other names the step that fastens a row back onto a name. The same glossary has to say how many technologies let a sum be worked out while the inputs stay locked. Which pair fits the two entries and that count?
選択肢
- unlinking breaks the tie to the person while relinking fastens a row back on a name, and the family of locked sums holds 2 members.
- unlinking breaks the tie to the person while relinking fastens a row back on a name, and the family of locked sums holds 3 members.
- relinking breaks the tie to the person while unlinking fastens a row back on a name, and the family of locked sums holds 2 members.
- relinking breaks the tie to the person while unlinking fastens a row back on a name, and the family of locked sums holds 3 members.