问题
填空题
函数y=1-sinx（x∈R）的单调减区间是______．
答案
由函数y=sinx的性质知，其在区间 [2kπ-
，2kπ+π 2
]，k∈z上是增函数，π 2
函数y=1-sinx（x∈R）的单调减区间是[2kπ-
，2kπ+π 2
]，k∈z；π 2
故答案为：[2kπ-
，2kπ+π 2
]，k∈zπ 2
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函数y=1-sinx（x∈R）的单调减区间是______．
由函数y=sinx的性质知，其在区间 [2kπ-
，2kπ+π 2
]，k∈z上是增函数，π 2
函数y=1-sinx（x∈R）的单调减区间是[2kπ-
，2kπ+π 2
]，k∈z；π 2
故答案为：[2kπ-
，2kπ+π 2
]，k∈zπ 2
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| I still don't believe in ghosts even after my experience at the Rose Inn. 1 I have never seen one. But stories have made me feel 2 since then. I arrived at the inn late at night and asked the landlord for a room. "There is nothing left," he said, " 3 you'd like to sleep in Number 7." "Why not?" I said. "What's 4 it? I am 5 that I would sleep 6 ." "Nothing," he said slowly, "but something happened there a few months ago." Every old inn has its own strange stories, so I thought that 7 he told me about it, the better. I was willing to listen to anything for a room to 8 . "A man came here late at night 9 you." the landlord said, "I thought there was something strange about him because he kept 10 while he was signing his name in the book. He asked me 11 room he could have and I offered him No.7.' 12 a man who has said he'll 13 me,' he said suddenly, 'with a knife.' He looked so frightened that I thought I had better 14 him to his room. I closed the door and left him 15 . The next day we found him dead, with a knife beside him. He had cut his throat." The landlord said, "Or 16 had done it. Do you 17 sleeping there now you know the story?" "Well," I said, "no one is 18 me. But I wish you had told me the story 19 . As it is, I'll sleep here on the floor in the bar if you have a couple of 20 ." | ||||
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