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【单选题】
下列公文用语含歧义的是______。A.
本案三个调查组工作人员，分别到广州、上海、南宁取证
B.
你单位《关于增加2015年度科研经费的请示》(×字〔2015〕1号)收悉，现批复如下
C.
为严肃校纪，决定给予开除学籍处分，并通报全校
D.
以上所请妥否，请批复
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】美国近代艺术家( )的作品大都是利用“喷洒法”制成的,就是将颜料调制成适宜的稀度,进行喷洒或者倾倒在平面上所获得的肌理效果。
A.
乔治·布拉克
B.
波西·杰克逊
C.
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D.
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【单选题】设有关系 R 和 S ,在下列的关系运算中,( )运算不要求 R 和 S 具有相同的目数,也不要求对应属性的数据类型相同。
A.
R ∪ S
B.
R ∩ S
C.
R-S
D.
R × S
【简答题】任务型阅读.。 Everyone has got two personalities: one is shown to the world and the other is secret and real . You don’t show your secret personality when you are awake , but when you are asleep, your slee...
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【单选题】设有关系 R 和 S ,在下列的关系运算中,( )运算不要求 R 和 S 具有相同的目数,也不要求对应属性的数据类型相同。
A.
R ∪ S
B.
R ∩ S
C.
R-S
D.
R × S