问题
选择题
函数f(x)=ax2+bx+c的图象经过(-2,0),(1,5),(6,0)三个点则f(x)>0的解集是( )
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答案
答案:A
函数f(x)=ax2+bx+c的图象经过(-2,0),(1,5),(6,0)三个点则f(x)>0的解集是( )
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答案:A
小题1:There are _______notices(启示)in the Lost And Found. A. B. 4 C. 1 小题2: Who lost a pencil case? A .Jenny B. Dave C. Mike 小题3: Linda found_____. A. a ruler B. a set of keys C. a watch 小题4: What color is the watch? A .It’s red. B. It’s white C. It’s blue. 小题5: You lost your keys. What number should (应该) you call ? A. 26-7895 B. 78-5900 C. 289-9000 |