1.

For the spherical surface x

A. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> +</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">&amp;jcirc;</td></tr><tr><td style="text-align: center;"> <span style=" text-decoration: overline;">2</span></td><td style="text-align: center;"> <span style=" text-decoration: overline;">2</span></td></tr></table>
B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> -</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">&amp;jcirc;</td></tr><tr><td style="text-align: center;"> <span style=" text-decoration: overline;">2</span></td><td style="text-align: center;"> <span style=" text-decoration: overline;">2</span></td></tr></table>
C. k
D. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> +</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">&amp;jcirc; +</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">k </td></tr><tr><td style="text-align: center;"> <span style=" text-decoration: overline;">3</span></td><td style="text-align: center;"> <span style=" text-decoration: overline;">3</span></td><td style="text-align: center;"> <span style=" text-decoration: overline;">3</span></td></tr></table>
Answer» B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> -</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">&amp;jcirc;</td></tr><tr><td style="text-align: center;"> <span style=" text-decoration: overline;">2</span></td><td style="text-align: center;"> <span style=" text-decoration: overline;">2</span></td></tr></table>


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