题目

如图所示，下列说法不正确的是（ ） A. 图一中的a代表腺苷，A代表的是腺嘌呤B. ATP生成ADP时图一中的c键断裂并释放能量C. ATP与ADP相互转化过程中物质是可循环利用的，能量是不可逆的D. 酶1和酶2催化作用的机理是降低反应的活化能 答案：【答案】A【解析】ATP的结构如下图所示：图一中的a代表腺嘌呤核糖核苷酸，A代表的是腺嘌呤，A错误；ATP生成ADP时远离腺苷的高能磷酸键（即图一中的c键断裂）断裂并释放能量，B正确；ATP与ADP相互转化过程中，ATP、ADP、Pi等物质是可循环利用的。ATP水解释放的能量是储存在高能磷酸键内的化学能，而阅读理解。     Teachers have been honored in Indian culture for centuries. In the past, the teacher-studentrelationship in India was almost divine (神圣的). If a person wanted to become the student of a teacher,he or she had to live with the teacher, serve the teacher, engage in activities and also acquire knowledge. Even kings were expected to follow these rules.      It was the second president of independent India, Dr. Sarvepalli Radhakrishnan, who raised the Indian devotion to teachers to a new level. During his tenure (任期) as president he was once approached by some citizens who wanted to celebrate his birthday. However, Dr. Radhakrishnan declared that he would rather have his birthday observed as Teachers' Day. Since then, September 5h of each year has been celebrated as Teachers' Day throughout India.     All educational institutions honor teachers on September 5th in various ways. In some cases, senior students give teachers a day of rest by taking charge of classes. Some schools have ceremonies to honorexceptional teachers. Students also organize cultural events and recognize the efforts of teachers bygiving gifts, cards and flowers. Articles on teachers and their achievements feature in print and on theweb.     In addition to these efforts, the government of India has set up the National Awards for teachers, to be distributed (分配) on September 5th every year. Teachers selected for the Best Teacher Awardreceived a medal, a certificate and 25,000 Indian rupees as award money. Several private organizations and institutions have also come up with such awards to recognize the contribution of teachers to bringingup future leaders of the country.      Thousands of teachers are employed in Indian educational institutions. However, not every teacher can qualify for the Teachers' Day awards. But the biggest reward that any teacher can get is therecognition of students. And Teachers' Day is certainly that time in every year when pupils honorteachers and let them know that their hard work and commitment is valued.1. What is the text mainly about?A. The social status of teachers in India.B. The origin of Teachers' Day in India.C. Teachers and education in India.D. Teachers' Day in India. 2. What do we know about Teachers' Day in India?A. It is nationwide.B. It has been celebrated in India for centuries.C. It is related to a leader of ancient India.D. It is a holiday for everyone in India except teachers. 3. People in India celebrate Teachers' Day in all of the following ways EXCEPT by ______.A. giving presents to teachersB. holding ceremonies for teachersC. publishing articles on studentsD. giving teachers a day of rest 4. What is the biggest reward that teachers in India can get, in the author's opinion?A. All kinds of awards.B. Gifts given by students.C. The recognition of students.D. Ceremonies held by schools.