题目

阅读短文，根据短文内容，从所给的六个选项中选出可以填入空白处的最佳选项，使短文意思完整、连贯。（有两项为多余选项）The book that can't waitOne problem a lot of people have with books is that they buy them and then never read them. 1  It printed a book in disappearing ink: the text of the book disappears two months after the special package（盒）of the book is opened. It encourages buyers to read it before it goes away. People call this “he book that can't wait”. 2  The publisher（出版社）sold out all the first edition at设函数． ⑴将函数写成的形式． ⑵求函数的周期、最大值及最小值及当函数取最大值和最小值时相应的值的集合． （3）求函数的单调递增区间．