问题
选择题
y=(
|
答案
∵x2-2x-3=（x-1）2-4≥-4，y=(
)t是减函数1 2
∴0＜y≤(
)-41 2
∴0＜y≤16
故选C．
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y=(
|
∵x2-2x-3=（x-1）2-4≥-4，y=(
)t是减函数1 2
∴0＜y≤(
)-41 2
∴0＜y≤16
故选C．
On Fridays, I come home from work at about 2:00 in the afternoon and I just have a rest. On Friday evenings, I don’t go out, but __36__ a friend of mine comes for __37__. He or she __38__ the wine(酒) and I cook the meal. I love cooking! We listen to music or we just __39__. On Saturday mornings, I get up at 9:00 and I go to the __40__ to buy something. Then in the evenings, I sometimes go to see a film. I love __41__! Then I eat in my favourite Chinese __42__. On Sunday... Oh, on Sunday morning I stay in bed __43__. I don’t get up until 11:00! Sometimes in the afternoon I __44__ my sister. She lives in the village and has two children. I like playing with them, but I leave __45__ because I go to bed at 8:00 on Sunday evenings.
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