任务型阅读
    Chinese writer Mo Yan won the 2012 Nobel Prize in Literature(诺贝尔文学奖)．He is the first Chinese to win the prize．
    Mo Yan was born into a farmer's family in Shandong in 1955．He left school to work at the age of twelve，first on the farm，later in a factory．In 1 976 he joined the PLA and during this time he began to study writing．His first short story was published(出版)in 1981．He has written many famous books about his childhood and his home town．Many of his books were translated into English，French and many other languages．
    Mo Yan's winning of the Nobel Prize in Literature，widely regarded as(被认为)a great encouragement for China's literature，is bringing more confidence to the nation's young authors．
根据短文内容，回答下列问题。

2017年6月，“第十一届中国国际有机食品博览会”在上海成功举办。它涵盖了全球范围系列的有机绿色食品，其中无污染的有机蔬菜尽管价高仍受消费者青睐。关于有机蔬菜价格高，以下分析正确的是（    ）

①“无污染”有机蔬菜的高品质决定了“其价格高”

②“无污染”有机蔬菜的劳动耗费决定了“其价格高”

③“无污染”有机蔬菜的高品质是实现“其价格高”的物质承担者

④种植“无污染”有机蔬菜的社会劳动生产率提高

Scientists say it may be a few years ______ it is possible to test the new medicine on patients.

如图所示，护林员利用一块平面镜使此时的太阳光水平射向山洞中P点，请你通过作图标出平面镜的位置，并标出反射角的度数．

为提高煤的利用率，减少污染，可将其转化成可燃性气体，此过程可以认为是碳与水的反应．其微观示意图如图所示，下列说法错误的是（   ）