There are no ________.（  ）

下面表格左栏中的内容是《政府工作报告》提出的2013年我国经济社会发展的主要预期目标。请在右栏的相应位置，写出与之相适应的宏观调控目标。

汽车防冻液

冬季气温低，为使汽车在冬季低温下仍能继续使用，发动机冷却液使用的不是纯水，而是加入了一些能够降低水凝固点的物质作为防冻剂，保持在低温天气时冷却系统不冻结．因此人们有时把冷却液称作“防冻液”或“不冻液”．

现在经常使用乙二醇为主要成分的防冻液．乙二醇是一种无色微粘的液体，沸点是197.4℃，凝固点是﹣11.5℃，能与水任意比例混合．混合后由于改变了冷却水的蒸气压，凝固点显著降低．其降低的程度在一定范围内随乙二醇的含量增加而下降．当乙二醇的含量为68%、水为32%时，防冻液凝固点可降低至﹣68℃，超过这个极限时，凝固点反而要上升．40%的乙二醇和60%的软水混合成的防冻液，防冻温度为﹣25℃；

当防冻液中乙二醇和水各占50%时，防冻温度为﹣35℃．防冻液的沸点通常在零上110℃．

（1）防冻液中乙二醇和水的配置比例，既要考虑当地的气温条件，一般选用防冻液的冰点应低于当地最低气温10℃～15℃；又要兼顾经济利益．你认为在中国江南使用下面哪种比例的防冻液最好____ 

A．40%              B．50%              C．60%

（2）请根据材料信息分析一下，与单独使用纯水相比，乙二醇防冻液对汽车除了有防冻作用，还有什么作用____ ．

    You are twenty-one years old and live a happy and peaceful life. ____ one day, your doctor tells you that you have a serious disease and will die soon. What would you do?____ (probable) most of us might feel very sad and give up our dreams and hopes for the future. Here is ____ the great scientist, Stephen Hawking, did.

    Hawking wasn't ____ (discourage) because of his physical condition.____, he went on with his study of the universe. In 2002, Hawking was invited to China. He told Chinese students about his theories and thoughts ____ some of the greatest questions: what is time, how the universe began, and what are black holes. He impressed the audience with his humor, confidence and of course his ____ (wise).

    Hawking became famous in the early 1970s. In 1988, he wrote A Brief History of Time, in ____ he explained difficult theories in a simple way. The book ____ (sell) well since it came out.

    Stephen Hawking is a man with a strong will and he is regarded as the ____ (great) mind in physics since Albert Einstein.