constraint ck_t_score_score check(0<=score<=100)< /div>
B.
constraint ck_t_score_score check(score>=0) and (score<=100)< /div>
C.
constraint ck_t_score_score check(score>=0 and score<=100)< /div>
D.
constraint ck_t_score_score check(score>=0 or score<=100)< /div>
【判断题】省煤器是利用锅炉尾部烟气的热量加热锅炉给水的设备。( )
【单选题】省煤器是利用锅炉尾部烟气热量来加热锅炉()的热交换设备。
【判断题】省煤器是利用锅炉尾部烟气的热量加热锅炉给水的热交换设备。