第2题: [单项选择]In which situation Indians wouldn’t use sign language according to the passage A. When they wanted to kill an enemy. B. When they wanted to identify a stranger. C. When they wanted to tell the time of the day. D. When they wanted to send a message to a person far away. 参考答案:A 答案解析:[听力原文]17-20
Sign language is a way of talking by using signs. Indians used sign language when th
第18题: [填空题]平行于直线6x+2y+1=0且与曲线y=x3+3x2-5相切的直线方程为______. 参考答案:3x+y+6=0. 答案解析:[分析] 解决本题的关键在于求出曲线y=x3+3x2-5的切点坐标,显然直线的斜率为-3,由于所求的切线平行于直线,故其斜率k=-3,又k=y’=3x 第19题: [单项选择]关于个人目标,我认为我的情况是()。 A. 每个时段都有目标,并且都能实现 B. 计划赶不上变化,因此一般不制定目标 C. 目标很多,但很少能实现 D. 有些时段有目标,一般都能实现 参考答案:B 答案解析:请考生联系实际情况作答!