第20题: [单项选择]Jean worked just so much ______. A. like what she was told to B. as she was told to C. as to what she tried to do D. like she was told to 参考答案:B 答案解析:根据so much as句型的固定搭配,首先排除A和D。选项C中的as后跟了介词to,那么就应该是名词词组而非名词从句。因此正确答案是B。
第21题: [单项选择]胆汁可以促进脂肪的消化和吸收,主要是由于它含有() A. 脂肪酶 B. 胆红素 C. 乳化酶 D. 胆盐 E. 胆固醇 参考答案:D 答案解析:胆盐是胆汁中最重要的成分,它可以乳化脂肪,降低脂肪表面张力,增加与胰脂肪酶的接触面积,促使脂肪分解消化。它还可以作为运载工具将不溶于水的脂肪分解产物运送到小肠黏膜,促使脂肪吸收。