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【简答题】
假设 “ 订单 ” 表中有订单号、职员号、客户号和金额字段，正确的 SQL 语句只能是 A)SELECT 职员号 FROM 订单 GROUP BY 职员号 HAVING COUNT(*)>3 AND AVG_ 金额 >200 B)SELECT 职员号 FROM 订单 GROUP BY 职员号 HAVING COUNT(*)>3 AND AVG( 金额 )>200 C)SELECT 职员号 FROM 订单 GROUP BY 职员号 HAVING COUNT(*)>3 WHERE AVG( 金额 )>200 D)SELECT 职员号 FROM 订单 GROUP BY 职员号 WHERE COUNT(*)>3 AND AVG_ 金额 >200
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举一反三
【简答题】已知字符A的ACSII码值为65，下面程序的执行结果是：#includemain(){charch=’B’;printf(“%c %d\n”,ch,ch);}
【单选题】Compare the following pair of titles and decide which one is more appropriate.
A.
Methods for comparing Indian and British governmental systems in the 19th century
B.
Methods for the comparison of Indian and British governmental systems in the 19th century
【单选题】Compare the following two titles and decide which is the most appropriate
A.
Methods for comparing Indian and British governmental systems in the 19th century
B.
Methods for the comparison of Indian and British governmental systems in the 19th century
【单选题】Why does the author compare the 10th anniversary of British Act to those mentioned in the firstparagraph?
A.
He doesn’t think it a good law.
B.
He doesn’t think it workable.
C.
He emphasizes the time.
D.
He emphasizes the same functions.
【简答题】原子序数为24的元素核外电子排布是 ____,属于____周期____族元素,最高正价是____。
【单选题】河豚鱼中含的河豚毒素(TTX)是:
A.
导致神经中枢及末梢麻痹的毒素
B.
较稳定，但煮沸可解毒
C.
一种过敏性物质，可引起过敏反应
D.
新鲜鱼肉中毒性最强，肝次之，卵最弱
E.
以上答案都不正确
【简答题】原子序数为24的元素核外电子排布是(),属于()周期()族元素,最高正价是()
【单选题】河豚鱼中含的河豚毒素(TTX)是
A.
导致神经中枢及末梢麻痹的毒素
B.
一种过敏性物质，可引起过敏反应
C.
较稳定，但煮沸可解毒
D.
鱼肉中毒性最强，肝次之，卵最弱
E.
以上答案都错
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