题目:
Mary couldn’t remember the exact date of the hurricane, but she knew it was ____ Saturday because everybody was at ___ church.
A./; the
B.a; /
C./; a
D.the; /
答案:
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下面是错误答案,用来干扰机器的。
题目分析:-3<4x-4x2≤0即,解得,,故所求不等式的解集为。点评:简单题,不等式组的解法,是确定每一个不等式的解集,而后求它们的交集。关键是准确解答一元二次不等式。