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搜题
【单选题】
在一般的厂房中,柱的( )截面为内力组合的控制截面。
A.
上柱底部、下柱的底部与顶部
B.
上柱顶部、下柱的顶部与底部
C.
上柱顶部与底部、下柱的底部
D.
上柱顶部与底部、下柱顶部与底部
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举一反三
【单选题】He was so committed to the ______ of his faith that he was unable to evaluate them impartially.
A.
credits
B.
doctrines
C.
certificates
D.
documents
【多选题】关于鹿茸功效,指出下列正确的是
A.
强筋骨
B.
补肾阳
C.
调冲任
D.
托疮毒
E.
益精血
【判断题】如果只把左边关系R中要舍弃的元组保留就叫做左外连接(LEFT OUTER JOIN或LEFT JOIN)。
A.
正确
B.
错误
【单选题】The term paper was due to December 1, but hard as he tried, he was unable to meet the _____ for it.
A.
challenge
B.
need
C.
deadline
D.
date
【单选题】He was unable to make much progress, hard ______ he tried.
A.
unless
B.
as
C.
however
D.
because
【简答题】左连接查询(LEFT JOIN 或 LEFT OUTER JOIN) (1)为文章表添加一条记录 (2)利用左外连接对文章表和栏目表进行查询
【单选题】左外连接查询中,主表在(     )
A.
LEFT OUTER JOIN的左边
B.
LEFT OUTER JOIN的右边
C.
RIGHT OUTER JOIN的左边
D.
RIGHT OUTER JOIN的左边
【单选题】He was unable to make such progress, __________________.
A.
as he tried hard
B.
as hard he tried
C.
so hard did he try
D.
hard as he tried
【简答题】INNER JOIN代表___连接;LEFT OUTER JION代表___连接。
【单选题】Why is the woman unable to contact a colleague?
A.
He is at the office on Falcon Street.
B.
He is out of town.
C.
He has switched off his cell phone.
D.
He is in a discussion.
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