从几千年前到现在，酶制剂就安全地在被使用在工业、美容和口腔护理产品、纺织品、食品（如酸奶酪）以及芝士、啤酒和白酒等的发酵生产过程中．下列各项中，不属于酶制剂的是（ ）

如图所示是一鞋店的招牌，晚上招牌上的“外贸鞋”三字清晰地印在墙壁上，此时墙壁产生了 ____反射；从墙壁上看到的三个字是外面灯的 ____（填“实”或“虚”）像．

长江三角洲农耕条件优越，农业历史悠久，农业生产水平高，是举世闻名的（    ）

    Everyone needs friends. But how do you find real friendship and keep it?

    The American writer ，Sally Seamans， tells young students some smart ways to find friends. Sally says founding friendship is just like planting a tree. You plant the seed (种子) and take care of it to make it grow.

    First, you should choose a friend. What makes a good friend? It is not because a person has money or good looks. A good friend should be kind and patient. ⑴For example, if you have a bad day, a good friend could listen to your complaints (抱怨) and do his or her best to help you. To make a friend, you can't be too shy. You should make each other happy and share your lives.

    But things can not always be happy. Even the best friends have fights. What should you do when you have a fight with your friend? You should talk to him or her carefully.

    ⑵Tell him or her how you are feeling, say what your friend did wrong and talk about why you did this or that. Remember that friendship is one of the most important things in your life.

根据短文内容，完成下列各题。