提示：1）学习英语的重要性；

      2）几种学习方法，如，多读，多听，勤练等；

      3）提出鼓励，发出号召；

要求：1）可适当发挥，60词左右；开头结尾已给出，不计入总词数。

      2）字迹工整，语言流畅，表达正确，逻辑清晰。

All over the world, students are learning English.

Come on! I'm sure you'll do better in your English.

    Good habits are important to us. We should build good living habits. Now let's have a look at the two brothers. Li Qiang and Li Gang are brothers. But their living habits are different. Now let's go to Li Qiang's room. Li Qiang cleans his bedroom every day and puts his things away. Look! There is a computer on the desk. There are two balls under the bed. A guitar and a kite are on the wall. Some books are on the shelf. So he must be a careful boy. Now let's go to Li Gang's room. The room is not clean. Can we see his clothes on the desk? Oh, yes. We can see a football and a knife on the desk, too. Li Gang never does any cleaning on weekends. So his room is in a mess.

    What do you think of Li Qiang and Li Gang? Li Qiang is a good boy. Li Gang must learn from his brother

有关基因突变的叙述，正确的是（ ）

小飞同学想研究小灯泡的发光亮度与实际电功率的关系，选取了一个标有“2.5V”、额定功率约为1W的小灯泡和必要的实验器材．