He ____the challenge of joining in the 2017 Wuxi Marathon in his sixties.

根据短文判断下列句子是否正确,正确的写 “正确”,错误的写 “错误”

    Hello, my name is Li Ming. I am a boy. I am eleven years old. Now let me tell you something about my family. There are four people in my family. They are my father, my mother, my sister, and I. My father likes January and February. I like October. I don't like January and February. It's cold today.

你来到战国，随着____和____的推广，各国经济不断进步和社会不断发展。

用光学显微镜观察人体血涂片时，三种血细胞清晰可见．（判断对错）

①实施可持续发展战略

②坚持以人为本，全面、协调、可持续发展的发展观

③正确处理好人口、资源、环境之间的关系

④不计任何代价地开发和利用现有的一切资源