The equator is（）.
A. the primary great circle of the Earth perpendicular to the axis
B. the line to which all celestial observations are reduced
C. the line from which a celestial body's altitude is measured
D. All of the above
著名心理学家（）认为，心理健康的标准有10个方面。
A. 马斯洛
B. 布拉姆
C. 麦特曼
D. 卡渡维奇
“潮电街”市场的卖家发生哪些情形？将被“潮电街”市场清退。
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