As early as 1647 Ohio made a decision that free, tax-supported schools must be established in every town __________ 50 households or more.
A) having B) to have
C) to have had D) having had
下列哪个子句实现对一个结果集进行分组和汇总?()A.HAVINGB.ORDER BYC.WHERED.GROUP BY
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A student went to college after41all his school examinations. There he put his name downfor world geography,42after the first day, he did not go to43any more. The teachernoticed that this student was44absent and thought that he had changed to45class. He wasvery46when he saw the boy's name on the list of students47wanted to take the geographyexamination48the end of the year. The teacher had prepared a difficult examination paper, which covered49he had taught,and he was eager to see50this student answered the questions. He expected that his answerwould be very51 ; but when he examined his paper carefully, he found only one small mistakein them.52this surprised him very much, he went through the paper53, but was still notable to find54one mistake, so he sent55the student to question him about his work. When the student had56the room, the teacher said to him, "I know that you came to my classonly once on the first day and that you have been absent from all the others. Yet I have found onlyone small mistake in your paper.57is that? " "Oh, I'm sorry about that mistake, sir," answered the student."After the examination, Irealized58! ought to have written. I would not have made that mistake59 I had not beenconfused by your60lecture." 阅读以上短文，回答161-180题。 第41题答案是__________A.having B.taking C.passing D.failing
Bats are surprisingly long-Jived creatures, some__________a life span of around 20 years.A.having B.had C.have D.to have
How often ___ your teeth examined?A.are you having B.do you have C.have you get D.you have
Dated back to the middle of 16 century,Wales in Great Briton made a educational policy that free,tax-supported schools must be established in every town （ ）100 households or more. A.having B.to have C.to have had D.having had
Be quiet! They （） a meeting in the next room.A、are havingB、haveC、were havingD、will had
创建视图时，不能使用下列哪个关键字？（）A、HAVINGB、WHEREC、ORDERBYD、它们都是创建视图的有效关键字
