全要素生产率是衡量单位总投入的总产量的生产率指标，即总产量与全部要素投入量之比。全要素生产率的增长率常常被视为科技进步的指标，以下属于提高全要素生产率的途径是（  ）

①掌握系统优化方法，优化配置生产要素

②抓住主流，不断增强国有经济的控制力

③用发展观点看问题，推动产业结构优化升级和科学技术创新

④坚持两点论与重点论的统一，实行更加积极主动的开放战略

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    What's the red star in the sky through a telescope(望远镜)? It is Mars. Do you want to know more about it? Take the “Mars Orbit Express”!
  “Mars Orbit Express” is a space probe (探测器). It was sent towards Mars by American scientists on August 12th, 2005. Its tasks are to study Mars' atmosphere and return photos to Earth. But before that “Mars Orbit Express” must travel about 100 hundred million kilometers and seven months. It reached Mars' orbit(轨道)in March, 2006.
    Mars and Earth have similar weight and size. However, Mars is closer to the sun than Earth. Mars is very cold. The average temperature is below 50℃. The temperature at noon only reaches 20℃ during a Mars day. Its atmosphere is mostly CO2. It has much sand and two moons---Phobos and Deimos.
    Scientists think Earth and Mars had similar beginnings 4.6 billion years ago. But while Earth supports millions of lives，Mars becomes bad. “Earth easily could have turned out like that.” said an scientist, “It is important for us to find out why and Mars Orbit Express' should do that.” “Mars Orbit Express” also would help scientists to learn what might happen to Earth in the future.  “Mars Orbit Express” would work for about four years.

我国陆地相邻国家最多的省（区）是（   ）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词。2.只允许修改10处，多者（从第11处起）不计分。

    During the National Day holiday, I paid a visit my grandma in the countryside. It has been almost two years since I last saw her. In my memory, my grandma was a hardworking but strong woman full of energy. Whenever she saw me, she always hugged me deep. But when I gave her a hug this time, I found that she was much short and thinner than before. Her back was become bent and her hairs turned white. But luckily, she was still health. She could laugh like a child. To my happy, she could cook some delicious food for me. I love my grandma. I know he will always be there, helping me and loving me.