【单选题】当删除父表中的数据时,在CREATE TABLE语句的外键定义中指定的()选项删除子表中的数据。
【单选题】一个长期实行集权型管理的企业,随着企业规模的扩大,在其向更为分权的管理方式转化的过程中,可能遇到的最大的挑战和困难是()
【单选题】The purpose of Emily Rosa's experiment was _________.
A.
to see why TI' could work the way it did
B.
to find out how TT cured patients' illnesses
C.
to test whether she could sense the human energy field
D.
to test whether a human energy field really existed
【单选题】已知char ch=′C′;则表达式ch=(ch>=′A′ && ch<=′Z′)?(ch+32):ch; 的值是 ( )。
【判断题】Monochrons see time as discrete,linear, being divided into elements that can be organized, quantified and scheduled.