将函数y=cos(x－)的图像上所有点的横坐标伸长到原来的2倍（纵坐标不变），再将所得图像向左平移个单位，则所得函数图像对应的解析式是
What else do you need， sir？
________else． I've got enough， Thanks．（ ）
A．NothingB．AnythingC．SomethingD．Everything
The Dragon Boat Festival is _____fifth day of May on the lunar calendar（阴历）（ ）
A．inB．onC．atD．by
Could you please tell me ___？
Well，I always write e﹣mails to my pen pals．（ ）
A．how do you learn Chinese
B．what is your pen pal's hobby
C．what do you do after class
D．how you improve your writing
Is this a new piano？
No．I have _____ it for a long time．（ ）
A．hadB．joinedC．boughtD．borrowed
How do you _____ with your classmates？
Very well．They are all friendly and helpful．（ ）
A．get offB．get onC．put off．D．put on
)的图像上所有点的横坐标伸长到原来的2倍（纵坐标不变），再将所得图像向左平移
个单位，则所得函数图像对应的解析式是
粤公网安备 44130202000953号