相关考题
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问答题
一矩形断面陡槽，如图所示，槽宽b=5m，下接一个宽度相同的缓坡明槽，当通过的流量Q=20m3/s时，陡槽末端水深h1=0.5m，下游水深 ht=1.80m，试判别水跃的衔接形式。如果水跃从1一1断面开始发生，所需下游水深应为多少？ -
单项选择题
What is true about updates through a view?（）
A.You cannot update a view with group functions.
B.When you update a view group functions are automatically computed.
C.When you update a view only the constraints on the underlying table will be in effect.
D.When you update a view the constraints on the views always override the constraints on the underlying tables. -
多项选择题
躁狂发作的临床特征（）
A.心境高涨
B.思维奔逸
C.精力旺盛
D.爱管闲事、挥霍
E.活动增多
