Sally Ride was born in California in 1951. She was the first American woman to travel into space. She loved to play tennis and wanted to be a tennis player when she was young. But after three months' professional(专业的) training, she changed her mind. She went to Stanford University and started to study science. She studied stars and planets. She did researches at the university and got her PhD in astrophysics(天体物理学博士学位) after several years' hard work.

 In 1977, she took a test to become an astronaut. And then she was picked up from over 8,000 people. In order to realise her dream of going into space, she had to get different kinds of special and difficult training. She learned how to fly a plane, how to jump out of a plane as well as how to operate(操作)special machines

 Sally and four other astronauts flew a spaceship called Challenger on Jun. 18, 1983. She became the first American woman to travel into space. Later, she taught at the University of California. Then she wrote seven books on space for children, encouraging children to study science. Unfortunately, she died in 2012.

①“x²+x﹣2＞0”是“x＞1”的充分不必要条件

②命题：“∀x∈R，sinx≤1”的否定是“∃x₀∈R，sinx₀＞1”．

③“若x= $\frac{\pi }{4}$ ，则tanx=1，”的逆命题为真命题；

④若f（x）是R上的奇函数，则f（log₃2）+f（log₂3）=0．

青春期是青少年身心发展的关键时期，下列有关青春期健康叙述中，错误的是（  ）

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？

用过氧化氢溶液制取氧气时，加入二氧化锰，其结果是（）