第14题: [多项选择]尿素最适宜作根外追肥的原因是() A. 因为尿素不含有任何副成分,为中性有机小分子,电离度较小,对植物茎叶损伤小 B. 尿素分子体积小,易透过细胞膜,且具有一定的吸湿性,扩散性能好,易被植物吸收 C. 尿素进入细胞中不易引起细胞的质壁分离 D. 含有植物必需的营养元素 参考答案:A,B,C
第23题: [单项选择]Passage One Questions 26 to 28 are based on the passage you have just heard. A. It preserves the vitamins. B. It breaks down the vitamins. C. It makes the meat easier to digest. D. It reduces the protein content. 参考答案:C 答案解析:What’s the advantage of“slow and careful cooking of meat” [听前预测] 选项都是以It开头,与营养吸收有关的句子,由此可以推断,本题