函数y=sin(2x+φ)(0＜φ＜
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函数y=sin(2x+φ)(0＜φ＜
)图象的对称轴方程为：x=π 2
+kπ 2
-π 4
k∈Z，φ 2
函数y=sin(2x+φ)(0＜φ＜
)图象的一条对称轴在(π 2
，π 6
)内，π 3
所以
＜π 6
+kπ 2
-π 4
＜φ 2
当 k=0 时 π 3
＞π 12
＞ -φ 2
，φ=π 12 π 12
故选A
从方框中选择合适的句子完成对话，使对话完整并正确。 A: Hey, Robert! Wait a minute. B: What’s the matter, John? A: 小题1:________ B: Of course I can. What can I do for you? A: 小题2:________ B: Your birthday is next Saturday. We have more than a week to get ready for your party. A: Yes, you are right. I want to write some invitation cards today. B: That’s great. 小题3:___________ A: 小题4:My handwriting is bad, so I want you to write them for me. B: OK. 小题5:________You should practice writing to improve (提高) your handwriting. A: Thank you very much. I’ll do my best.
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