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How long() you() a member of the club?
A.have,,joinedB.have,,beenC.has,,joinedD.has,,been
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Where ________ you ________?A.are/beB.have/beC.is/beD.have/been
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7. Hi! This is_______ new teacher.__________ name is Linda.A. your; MyB. his; YourC. your ; HerD. her; His
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Nice to meet____(your).
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Why()the old block of flats()demolished next month?
A、are…beingB、is…beingC、has…beenD、have…been
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What's ( )job? Are ( ) British?A. your, yourB. you, yourC. your, you
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Merry Christmas, George! Here is a card for ________, with ________ best withes.
A.you…yourB.you…ourC.us…ourD.us…your
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Given the following DDL for the PARTS table:CREATE TABLE parts (part_no INT(9) NOT NULL, part_name VARCHAR(24), part_remain INT(9));All part numbers entered will be different and all rows should be displayed in order of increasing part numbers whenever the table is queried. Which of the following create index statements will meet this criteria and require the least amount of storage for the index object?()A.CREATE UNIQUE INDEX idx_partno ON parts(part_no)B.CREATE UNIQUE INDEX idx_partno ON parts(part_name ASC)C.CREATE UNIQUE INDEX idx_partno ON parts(part_name, part_no ASC)D.CREATE UNIQUE INDEX idx_partno ON parts(part_no, part_name ASC)
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( ) – Is Miss White __________ English teacher, Maria?– No, she teaches __________ geography.A.your;myB.you;mineC.you;usD.your;us
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将students中的列变量重新命名为: (1)id_number, name, gender, score, has_graduate (2)选出Bob的性别gender,并存入变量bob_gender (3)选出列has_graduate,并存入向量status (4)创建数据框part_df,其中包含前三个学生的所有信息 (5)创建数据框rest_df,包含其余学生的所有信息