解分式方程： $\frac{1}{x-2}$  = $\frac{x-1}{x-2}-3$ ．

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加州牛肉面

    穿过五月花广场的时候，林郁急匆匆的脚步声第一次放舒缓了一些，还仰起了脸迎着夕阳金色的余晖。恰好教堂敲响礼拜的钟声，成群的鸽子从喷泉劲射的水柱旁掠过。几位黑人摇滚乐手走过来，向他露出了好看的白牙。

    今天是个美妙的日子。林郁不禁哼着《美丽的加利福尼亚》，找了一家加州牛肉面馆，正经八百地坐在餐桌旁，接受美国女招待的服务。一年多来，他一直在这样的馆子干洗盘子的苦差，至今也没有品尝出加州牛肉面和咱们的兰州牛肉面有什么不同。

    好了，总算幸运，他设计的小童凳，终于被一家儿童用品超级商场的老板点了头。美国佬真痛快，看中了，一下就拿出5000套的订单。在加州，成功往往在不经意之间。同是武汉来的一位电脑工程师，为停车场晒太阳的小汽车设计了折叠式钢丝白布蓬，起了个俏皮的名字叫“汽车太阳镜”，从老美的荷包里掏出大把大把的钞票，如今开了两家公司呢。

    回到寓所，林郁却不敢陶醉，伏在设计图上精心修改。这是一组竹节、树兜、蘑菇形状的小童凳。一个个富有中国园林的山野情趣，又有那么一点点西方抽象艺术的现代韵味。或许，这就是美国佬乐意说OK的妙处所在？

    楼道里响起沉重的脚步声，接着响起沉重的关门声。林郁知道，这是邻居——一位著名的台湾流体力学专家回来了。他原来好风光，供职于一家高科技军火公司，年薪让大陆人想都不敢想。偏偏“冷战”降下帷幕，经济萎缩，以高科技军火工业闻名的加州倍受打击。他被炒了“鱿鱼”，这几天正被迫在街头擦皮鞋。“皮鞋，也需要流体力学吗？”林郁觉得有点开心。

    加州牛肉面真不容易吃啊！林郁为自己庆幸，不禁抓起床头的拉力器使劲拉了一下，仿佛要试试自己的力量。在用尽力气撑开最后一个回合时，他一眼瞥见床头妻子和女儿的照片，眼角一下迸出了泪花。

    一切努力都十分顺利。林郁同家乡的一家工艺品出口公司订了货，还点名挑选著名的星海钢琴厂承担油漆工艺。他要让小童凳闪烁中国国漆的古典光彩，柔和而凝重，体现东方文化的高雅与悠远，征服加利福尼亚和整个美利坚。

    样品很快送来加州，果然出色，宛如一套精致的工艺品。国漆的光泽沉静温润，又拉出了木纹、竹斑……很适合贵夫人们去娇宠她们的小宝宝。美国的童凳太没文化，不是一段粗糙笨拙的原木，就是冷冰冰的钢制组装品。

    林郁特意借了台湾流体力学家的高级轿车，去超级商场送样并确定交货期。他已胜券在握，让国内提前生产了5万套。

    “NO，NO，”一位经销主管连连摇头，“林先生，你为什么修改设计，给这么有魅力的作品穿了一件多余的外衣？”

    完全出乎意料，林郁急忙托起一只“蘑菇”说：“瞧，只有中国才能制造出这么美妙的工艺品……”

    “NO，孩子们不需要工艺品。他们只需要最原始、最自然、最亲切或者能唤起好奇心而动手去组合的东西。”

    林郁懵了，只顾选择一些美丽的词语，夸耀中国的传统国漆工艺。

    “NO，在我们美国人看来，越是漂亮的东西越不可靠。顾客们有充分的理由这么怀疑：只有非常糟糕的木料，才用得着刷这么好看的油漆……尽管我个人对你们国漆工艺充满敬意。”

……

    林郁又找到了一家加州牛肉面洗盘子。半夜三更，饥肠辘辘扒拉牛肉面时，他依稀觉得味道与中国的牛肉面不太一样。

抬起眼，窗外一派灯红酒绿。加州不是他的家，但加州牛肉面还得吃下去，吃出味道来……

下列A，B，C三张图依次表示酶浓度一定时，反应速度和反应物浓度、温度、pH值的关系，请据图回答下列问题：

    While beach vacations may be a great way to take your mind off work, lakes surrounded by mountains make for an even grander experience. If you are looking for come peace on your vacation, we have some recommendations for you in the Caucasus (高加索).

Lake Sevan

    Lake Sevan is situated in the central part of Armenia, in the Gegharkumk province. It is the largest lake in Armenia, located 6,200ft above sea level. Along the lake shore, there are various accommodations such as resorts and hotels with plenty of activities to partake in such as windsurfing, swimming and sunbathing. While there, do not forget to visit one of the famous cultural monuments, the Sevanavank Monastery, and it offers a great view of the lake as well.

Lake Paravani

    Lake Paravani, located at 6,801ft above sea level, is in the south of Georgia, near the Javakheti plateau. At this level, altitude sickness can occur and it is a good idea to be prepared to adapt to it properly, or bring medication for altitude sickness. Being a volcanic lake makes for a more interesting: experience. The lake is best known for fishing. Do not come home during the winter months when the lake freezes.

Lake Cildir

    Lake Cildir is located in the Ardahan province. East Turkey, near the borders of Georgia and Armenia. It is the second largest freshwater lake of Eastern Turkey, and many tourists are not aware of this beautiful attraction. Lake Cildir is surrounded by mountains of the Caucasus. The lake freezes during late November. If the winter is not extremely cold, you can try some lake activities like ice skating and ice fishing.

Lake Van

    Lake Van is the must visit of all lakes in this list. The largest lake in Turkey. Lake Van is located on the eastern shore of Turkey and is also the most accessible lake here. It's situated at 5,380ft above sea level, and unique to lakes around the world, the water is high in salt content.