Schools have been lengthening the school day or added days to raise test marks, which   

Schools have been lengthening the school day or added days to raise test marks, which      be costly if schools need air conditioning on hot days.

Amight           Bcan           Cmust          Dneed

答案

B

相关题目

如果执行如图的程序框图,那么输出的S=(  ) A.22     
如果执行如图的程序框图,那么输出的S=(  ) A.22             B.46             C.94             D.190  
已知圆C经过,两点,且在y轴上截得的线段长为,半径小于5
已知圆C经过,两点,且在y轴上截得的线段长为,半径小于5。 (Ⅰ)求圆C的方程; (Ⅱ)若直线∥,且与圆C交于点,,求直线的方程。
He________his position as the manager of the department because he was offered
He________his position as the manager of the department because he was offered a better job. A.regained                     B.repeated C.represented             
解方程:(x+1)(x﹣2)=2x(x﹣2)
解方程:(x+1)(x﹣2)=2x(x﹣2)
Hardly________ ________ the train started. A. I had reached the station; than
Hardly________ ________ the train started. A. I had reached the station; than          B. did I reach the station;before C. had I reached the station; when         D. I reached th
— Did Alice enjoy the concert held in Grand Theater yesterday?    — Yes, s
— Did Alice enjoy the concert held in Grand Theater yesterday?    — Yes, she did. She _____ such an excellent concert for a long time. A. didn’t take part in                 
函数的图象为(    ) A.     B.     C.     D.
函数的图象为(    ) A.     B.     C.     D.
如图,已知两条直线l1:x-3y+12=0,l2:3x+y-4=0,过定点P(-1,2)作一
如图,已知两条直线l1:x-3y+12=0,l2:3x+y-4=0,过定点P(-1,2)作一条直线l,分别与l1,l2交于M、N两点,若P点恰好是MN的中点,求直线l的方程.

最新题目