题目

 Jack has made up his mind to live in the country. The underlined part means _________. A) agreed         B) promised      C) decided        D) hesitated 答案：C 若sinα＜0且tanα＜0是，则α是 [　　] A．第一象限角 B．第二象限角 C．第三象限角 D．第四象限角