CHANGE TABLE 职工表ALTER 职工号 SET CHECK LEFT(职工号,3)="000" ALTER TABLE 职工表 ALTER 职工号 SET CHECK LEFT(职工号,3)="000" ALTER TABLE 职工表 ALTER 职工号 CHECK LEFT(职工号,3)="000" CHANG ETABLE 职工表 ALTER 职工号 SET CHECK OCCURS(职工号,3)="000"

Shedoesn’tlikeMissAndersonsoshealwaysavoids______a

leaving being left to be left to leave

为教师表的职工号字段添加有效性规则职工号的最左边三位字符是ll0正确的SQL语句是

CHANGE TABLE教师ALTER职工号SET CHECK LEFT(职工号，3)="ll0" CHANGE TABLE教师ALTER职工号SET CHECK OCCURS(职工号，3)="110" ALTER TABLE教师ALTER职工号SET CHECK LEFT(职工号，3)="110" ALTER TABLE教师ALTER职工号CHECK LEFT(职工号，3)="ll0"

如图所示的器具属于省力杠杆的是

镊子独轮车托盘天平筷子

Andersonleftthetableremarkingthathehadsomeworktodo

saying doubting thinking knowing

Shedoesn’tlikeMissAndersonsoshealwaysavoids_______

being left alone being leaving alone being leaving behind being left behind

图所示电能表的示数为____________kW×h

Andersonleftthetableremarkingthathehadsomework.tod

doubting thinking saying Knowing

Andersonleftthetable{{U}}remarking{{/U}}thathehads

doubting thinking saying knowing

Shedoesn’tlikeMissAndersonsoshealwaysavoids______a

leaving being left to be left to leave

为教师表的职工号字段添加有效性规则职工号的最左边3位字符是110正确的SQL语句是

CHANGE TABLE 教师 ALTER 职工号 SET CHECK LEFT(职工号，3)="110" ALTER TABLE 教师 ALTER 职工号 SET CHECK LEFT(职工号，3)="110" ALTER TABLE 教师 ALTER 职工号 CHECK LEFT(职工号，3)="110" CHANGE TABLE 教师 ALTER 职工号 SET CHECK OCCURS(职工号，3)="110"

Shedoesn’tlikeMr.Andersonsoshealwaysavoidsalonewit

leaving being left to be left to leave

IfindithardtogetalongwithMissAndersonandthereforeI

to leave alone leaving alone to be left alone being left alone

Shedoesn'tlikeMissAndersonsoshealwaysavoids____wit

being leaving alone being left alone being leaving behind being left behind

Anderson left the table, remarking that he had some work to do.

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