一个圆柱体的高是5厘米，若高增加2厘米，圆柱体的表面积就增加25.12平方厘米，原来的圆柱体积是____立方厘米。

现有3支洁净试管甲、乙、丙，先向试管内加入2 mL可溶性淀粉溶液，再按如下图所示步骤操作，然后分别用斐林试剂检验。下列分析不正确的是（　　）

A

    It looks like there are more cats around us today. In fact, now there are about 58.1million pet cats in China. China has the second largest number of cat owners in the world 1 the United States. Every year, more young people take cats as pets.

    More cats bring more 2. Many people now work at pet shops and animal hospitals. But cats can become 3, too. Some people throw their pet cats away. Then the cats become 4. They can pass on diseases（疾病）, and they kill other animals like birds and frogs.

    So in Japan and Australia, the governments 5 homeless cats to animal hospitals. Doctors operate on them. So the cats can't have babies. In this way, the number of cats will not go up.

阅读下列材料，回答问题。

材料一　八政：一曰食(农业生产)，二曰货(商品流通)，三曰祀，四曰司空，五曰司徒，六曰司寇，七曰宾，八曰师。

——《尚书·洪范》

材料二　以九职任万民：一曰三农，生九谷……五曰百工，饬化八材；六曰商贾，阜通货贿……

——《周礼·天官》

材料三　僇力本业，耕织致粟帛多者，复其身 (免徭役)；事末利及怠而贫者，举以为收孥。

——《史记·商君列传》

材料四　世儒不察，以工商为末，妄议抑之。夫工固圣王之所欲来，商又使其愿出于途者，盖皆本也。

——清·黄宗羲《明夷待访录》