若直线l₁，l₂的方向向量分别为$\overrightarrow{a}$=（2，4，﹣4），$\overrightarrow{b}$=（﹣6，9，6），则（　　）

（一）现在的某些游戏将中国历史人物的身份加以改变，比如墨子变成了机器人、荆轲变成了美女、李白变成了刺客……对此，有人认为游戏创作必须符合历史，也有人认为这些改变可以吸引青少年关注历史，还有人认为游戏原本就是虚拟的……

根据上述材料，自选角度，自拟题目，写一篇议论文。

要求：观点明确，论据充分，论证合理。

（二）2017年12月，第四届全球互联网大会在浙江乌镇举行。会上有人说，未来30年属于用好互联网技术的国家、三十人以下的小企业、三十岁以下的年轻人。

这番话触发了你哪些联想与想象？请自拟题目，写一篇记叙文。

要求：想象合理，有叙述，有描写。

地球上最大的生态系统是（   ）。

    Everybody, welcome to ____(we) company. I am Luisa, Director of the department. Let me say something to you all. The starting of work can be exciting on the hand, and can also be ____(worry) on the other. No matter what your future job is, you will have to work with others. Leaning to get on well with others must come first,____ (include) all staff in the company and our ____ (custom).

    And secondly, right after my introduction, spend some time reading the introduction of our company and get to know the people in your office and find out ____ the company is like. This afternoon you can walk around our workshops and know ____ (much) about the products. No one is allowed ____ (leave) the company before 5:30 pm. By the way, lunchtime ____ (come) at 11:50 and it's free ____ charge.

    Remember: Learning is so important ____ it can change your future life.

This is what I'd like to say to you at the moment. If you still have any question, please come to my office. Thank you.