问题
选择题
胆固醇是人体必需的生物活性物质，分子式为C25H45O，有一种胆固醇酯是液晶材料，分子式为C32H49O2。用于生成这种胆固醇酯的酸是 [ ]
A．C6H13COOH
B．C6H5COOH
C．C17H15COOH
D．C7H8COOH
答案
答案：B
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胆固醇是人体必需的生物活性物质，分子式为C25H45O，有一种胆固醇酯是液晶材料，分子式为C32H49O2。用于生成这种胆固醇酯的酸是 [ ]
A．C6H13COOH
B．C6H5COOH
C．C17H15COOH
D．C7H8COOH
答案：B
| 阅读理解。 | |
 Here is an exam notice. Mrs. Johnson gave it to her students last week. Read it and answer the questions.
| |
| 1. Who gave the exam notice to her students? | |
| A. Mr. Johnson. B. Mrs. Johnson. C. Teachers' Office. D. English teacher. | |
| 2. Who could NOT take the English exam? | |
| A. Nancy. She didn't wear her sports shoes on June 22. B. Richard. He did not have breakfast before the exam. C. Wendy. She forgot to take an English dictionary with her. D. Tony. He went to school at 9:50 0n the morning of June 22. | |
| 3. Where was Class 3A at 2: 00 P. M. June 23? | |
| A. In the Piano Room. B. In their classroom. C. In the gym. D. At the Teacher's Office. | |
| 4. When were the written tests held? | |
| A. Only on the morning of June 22. B. Only on the morning of June 23. C. On the morning and afternoon of June 22. D. On the morning and afternoon of June 23. | |
| 5. You must ____ for the PE exam. | |
| A. bring dictionaries B. bring drink C. wear pants and sports shoes D. bring food |