如图，将⊙O沿弦AB折叠，圆弧恰好经过圆心O，点P是优弧上一点，则∠APB的度数为．
I had the meanest mother in the whole world. While 1 kids ate candy for breakfast, I had to have porridge, eggs or toast.When others had coke and candy for lunch, I had to eat a sandwich.. But
若角与角的终边关于y轴对称，则 A. B.C. D.
国家能源局统计数据显示，我国原油对外依存度目前已经达到了50%以上。我国正在谋求多元化进口通道并积极开发利用新能源。根据下列资料，结合所
秦始皇统一全国后说：“天下共苦战斗不休，以有侯王。赖宗庙天下初定，又复立国是树兵也，而求其宁息，岂不难哉!”基于此种认识，秦朝采取的地
已知等比数列{an}的公比q=﹣，则等于（） A． ﹣ B． ﹣3 C． D． 3
The great _____ of this computer is that it’s so cheap compared to the others. A. power B. strength C. energy
