挑战习题
1/5单选题
难度:

1.由直线及曲线所围成的封闭的图形的面积为( )
A
B
C
D
提示1:
IOaIkeS7rOWFiOeUu+WHuuW5s+mdouWMuuWfn++8jOWmguWbvuaJgOekujxpbWcgd2lkdGg9MjM1IGhlaWdodD0yNjIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9GRS9CQy9yQkFDRTFOUTBWcmhCZUh5QUFBVTBzbGZ2aVk0MTQucG5nIj4=
提示2:
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
正确答案:Qg==
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