题目

CJ 6 Fcbnuary,2019Imagine tens of thousands of huge engines are pushing our planet away from a dying sun.The visual effect is impressive and goes well with the story. The story is not the typical Hollywood style: A superhero saves the earth; everyone else is there to give a round of applause. The movie the Wandering Earth brings a serious question to the audience: What are you going to do when facing an unavoidable disaster to our civilization? All characters in the movie are ordinary people and everyone gives their answer with shining humanity. Against all the odds(逆境)without a good figh已知命题，．若命题是假命题，则实数的取值范围是          ．