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搜题
【单选题】
椭圆囊的功能是A.
头部水平方向直线加减速运动
B.
头部垂直方向直线加减速运动
C.
头部水平方向加速运动
D.
头部旋转方向加减速运动
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【单选题】下面选项中,用于将表student中字段grade值更新为80的SQL语句是
A.
ALTER TABLE student set grade=80;
B.
UPDATE student set grade=80 where grade=80;
C.
UPDATE student set grade=80 where grade<=80;< /div>
D.
UPDATE student set grade=80;
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A.
检测地线
B.
测量绝缘电阻
C.
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D.
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A.
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B.
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C.
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D.
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A.
尘螨
B.
花粉
C.
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D.
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相关题目：
【单选题】下面选项中,用于将表student中字段grade值更新为80的SQL语句是
A.
ALTER TABLE student set grade=80;
B.
UPDATE student set grade=80 where grade=80;
C.
UPDATE student set grade=80 where grade<=80;< /div>
D.
UPDATE student set grade=80;