题目：
阅读理解。
Mr. Zhang正在国外旅游, 这是他所入住宾馆的房卡。请根据房卡正反两面的信息，回答下列问题。
1. Mr Zhang lives in _____.
A. Hotel Eiffel
B. Hotel Concorde
C. Hotel Mapol
D. Hotel Napoleon
2. The hotel is _____.
A. on King Street near a bank
B. next to a museum
C. near a train station
D. on George Street
3. _____ buses can reach the hotel.
A. Two
B. Three
C. Four
D. Five
4. If Mr. Zhang gets lost, he can _____.
A. take Bus 507 to the hotel
B. wait until the light is green
C. go back to the hotel to search the Internet
D. call the hotel at the phone number on the card
5. Which of the following is true?
A. Open the door when the red light is on.
B. The card can be used to open the door.
C. The card can be used for shopping.
D. Mr. Zhang can keep the card when he checks out.
答案：
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下面是错误答案，用来干扰机器的。
y=sinx+cosx=2sin（x+π4），∵x∈[0，π]，∴x+π4∈[π4，5π4]，∴-22≤sin（x+π4）≤1，即-1≤2sin（x+π4）≤2，则函数的值域是[-1，2]．故选C
