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【单选题】
醛的官能团是A.
酮基
B.
羰基
C.
醛基
D.
羧基
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皮皮学刷刷变学霸
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【单选题】dept表和locations表的结构如下: dept表: Name Null? Type dept_id decimal(4) dept_name not null varchar(30) manager_id decimal(6) location_id decimal(4) city ...
A.
update dept set city=any(select city from locations)
B.
update dept set city=(select city from locations) where dept.location_id=locations.location_id
C.
update dept set city=(select city from locations where dept.location_id=locations.location_id)
D.
update dept set city=all(select city from locations) where dept.location_id=locations.location_id
【简答题】请提交你期中考试的PPT终稿。不交的本门课程成绩不及格,等着下学期补考。
【简答题】阅读理解。 Many do-it-yourself homeowners are interested in trying out solar power to learn about the technology and perhaps to provide energy for limited-use applications. There are a variety of ways to f...
【简答题】A time capsule buried by Apple founder Steve Jobs 30 years ago has been discovered after its location was long forgotten.In 1983, the young tech innovator was attending a conference in Aspen when he a...
【单选题】（）操作是由与短消息中心SMC相连接的互通MSC发送给移动用户MS当前所在的MSC的，与短消息中心SMC相连接的互通MSC收到短消息中心发给被叫移动用户短消息后，就向被叫移动用户MS当前所在的MSC发送此操作，以便将短消息发送给被叫移动用户MS。
A.
Provide Roaming Number
B.
Update Locatio
C.
MT-ForwardSM
D.
MO-ForwardSM
【单选题】面对游客的特别要求,下列导游人员处理方法不妥当的是( )。
A.
用餐开始后，游客以菜品不合口味为由要求换餐，导游人员予以满足，费用由游客自理
B.
游客要求导游人员为其提供色情活动项目，导游人员断然拒绝并进行合理解释
C.
外国游客出境前，请求中方全陪为其转递一些书籍和食品给当地的中国朋友，全陪予以拒绝
D.
游客希望亲友随团时，在车位及餐厅、订房等相关条件允许的前提下，导游人员征得其他游客的同意后，为其办理入团手续
【单选题】dept表和locations表的结构如下: dept表: Name Null? Type dept_id number(4) dept_name not null varchar2(30) manager_id nubmer(6) location_id number(4) city ...
A.
update dept set city=any(select city from locations)
B.
update dept set city=(select city from locations) where dept.location_id=locations.location_id
C.
update dept set city=(select city from locations where dept.location_id=locations.location_id)
D.
update dept set city=all(select city from locations) where dept.location_id=locations.location_id
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