分段解锁
参考答案：
分段解锁指列车每通过一个道岔区段，该道岔区段就立即解锁，即整条进路分段解锁。
In order to evaluate the effect that the computer has ______ people's life, they have handed out
questionnaires to more than one thousand young citizens, all of ______are picked out at random. [ ]
A. on; whom
B. for; them
C. for; whom
D. on; them
三号位队员上前扣快球（或作佯攻）掩护四号位扣拉开球的战术称为（）。
