为“学生”表的“年龄”字段增加有效性规则“年龄必须在18～45岁之间”的SQL语句是

The boy doesn't speak ______ his sister, but his writing is ______ good.[ ]

A. as well as, so    

B. more worse than, such

C. as well as, such  

D. worse than, so

思维不连贯最常见于（）

A.精神分裂症

B.癔症

C.器质性精神障碍

D.抑郁症

E.强迫症

If this magazine is not yours, ____ can it be?

A．what else

B．who else

C．which else's

D．who else's

昨天下午2时到4时你在做什么

发电厂对外供电时，所承担的全部负荷称作（）。

A.发电负荷

B.供电负荷

C.用电负荷

D.电力负荷