Parents should let their children make their own ____ (decide).
—Did you see _______ lions playing in the zoo last week?
—No, they were all sleeping. But I saw _______ cute monkeys.
——I can hardly believe my eyes. Is that you, Lucy?——Yes. It has been almost 20 years______ we were together.
上海这座东方明珠见证了中国百余年的沧桑巨变。下面四幅图片反映的是近代上海历史的变迁,请你根据所学历史知识回答问题。 请回答:(1)图一反映的是哪次战争后上海的命运?这次战争对中国近代社会产生了怎样的影响?(2)图二是在哪一运动中创办的近代军事企业?(3)图三的陈独秀在上海发起了什么运动?这场运动的口号是什么?(4)图四反映的是哪次爱国运动?这次运动有什么标志性意义?(5)综观上海历史的沧桑巨变,你有什么感受?
(I) 0<xn<9 ;
(II) xn<xn+1 ;
(III) xn≥9−8⋅(23)n−1 .