题目

如图是某医用葡萄糖注射商标的一部分，下列说法不正确的是(    )   A. 该葡萄糖注射液的质量分数为5% B. 100 mL该葡萄糖注射液中溶质为5 g C. 葡萄糖中碳元素、氢元素和氧元素的质量之比为1∶2∶1 D. 在人体组织里，葡萄糖在酶的作用下经缓慢氧化转变成CO2和H2O 答案：C 【解析】商标上注明该葡萄糖注射液的质量分数为5%，A正确；100mL该葡萄糖注射液中溶质质量＝100 mL×1 g/mL×5%＝5 g，B正确；葡萄糖中碳元素、氢元素和氧元素的质量之比＝(12×6)∶(1×12)∶(16×6)＝72∶12∶96＝6∶1∶8，C错误；在人体组织里，葡萄糖在酶的作用下经缓慢氧化转变成CO2和H2O，同时放出能量，D 任务型阅读。       My name is Carl. I have a good friend . His name is Ding Ding . We live in the same dormitory. He is polite when he meets teachers, he always says " hello " to them. And he likes smiling very much.      His smiling face makes us happy. He likes helping others, too, Look! There's an old woman carrying a heavy box . He runs to her and says " Can I help you ? "     "No, thanks." the woman answers. "I can do it by myself. "      Why does she say that? Because older people in America don't think they need a lot of help. 1. Ding Ding comes from                              .2. Carl                              with Ding Ding. 3. People like seeing Ding Ding's                               face. 4. The old woman is carrying a                               box. 5. The woman                              want Ding Ding to help her.