2017年12月3日，我国自主研发的世界上首颗暗物质粒子探测卫星“悟空”，探测到疑似暗物质信号的异常变化。中国科学院天体物理学家常进说，“这可能是暗物质的证据，但曲线的中断也许来自另外某种宇宙射线源，‘悟空’看到的是什么还需要更多数据来证实。”这表明（  ）

①实践决定认识，实践是检验认识真理性的唯一标准

②真理包含着谬误的成分，真理与谬误往往相伴而行

③客观事物是复杂的，其本质暴露和展现有一个过程

④人类的认识能力是有限的，有些东西是无法认识的

下列不属于克隆的技术是（　　）

完形填空
    In China, almost everyone knows Ma Yun. Ma Yun became one of1 men in China when his company Alibaba went on the stock（股票)market last year with a value of around £140 billion-the largest public offering in history.2 amazing thing it is! Here are some stories about him on the way to 3 .
    Ma made his4 trip to the US in 1995 and used the Internet 5 the first time. After 6 for "beer”, he saw that no results 7up about China. Then he searched for "China” and still saw no results. He decided to set up a Chinese website--the seed for Alibaba was sown(播种).Ma said he 8 many times in his life. He failed the College Entrance Examination in China three times and9 companies offered him jobs, including one at KFC. And he was refused by the famous Harvard University 10 times.
    Learning English was difficult when Ma was a teenager 10limited resources. However, he found that he could learn English well by giving tourists free guides around 11 hometown Hangzhou. And he kept it for nine years. Ma said that tourists opened up a new world for him because everything they said and did was so different from 12 he had been taught at school and by his parents.
    Ma's hero is Forrest Gump13never gives up. When he made a speech about his success at Davos(达沃斯论坛)in 2015,Ma said, "Life14 a box of chocolates because you never know what you are going to get.”15 as Ma does, never give up and you will be successful one day.

材料：新形势下，一纸文凭已经不足以成为就业的通行证。用人单位对专业知识技能、实践创新能力、团队合作能力、应变能力等提出了越来越高的要求。而已有的实践证明，一些大学生就业能力达不到用人单位的要求是大学生就业的重要制约因素。

“您稍微多吃点猪肝、豆制品，天气好，就多出去呼吸点新鲜空气。”中药学大学生志愿者，一句一句把这个季节的养生注意告诉老人。

理工大学物理系大学生志愿者，走进社区，带小朋友踩在杯子和木板上，体验“力的压强”；和小朋友一起畅想未来的机器人生活。

……还有很多高校自愿者都在积极地学以致用

结合材料，运用探索世界与追求真理的相关知识，分析青年学生如何做到学以致用，顺利实现就业。

 化学与我们的生产、生活息息相关．现有以下物质

①食醋 ②Ca₃（PO₄）₂③葡萄糖 ④活性炭 ⑤熟石灰 ⑥维生素A ⑦大理石 ⑧CH₄

请选择合适物质的序号填空：

（1）农业上常用作磷肥的是____ ；（2）能为人体提供能量的物质是____ ；

（3）常用作厨房调味品的是____ ；（3）常用于改良酸性土地壤的是____ ；

（5）常用作建筑材料的是____ ；（6）最简单的在机化合物是____ ；

（7）人体缺乏后能导致盲症的是____ ；（8）常用于冰箱除异味的物质是____ ．