问题
单项选择题 B型题
抗孕激素，用于抗早孕（）
A.丙酸睾酮
B.米非司酮
C.炔雌醇
D.醋酸氢化可的松
E.氯米芬
答案
参考答案：B
解析：醋酸氢化可的松的化学命名为11β，17α，21-三羟基孕甾4-烯，二酮-21-醋酸脂；炔雌醇为雌激素类药物与孕激素合用有抑制排卵协同作用；米非司酮为抗孕激素，可用于抗早孕。
搜题请搜索小程序“爱下问搜题”
抗孕激素，用于抗早孕（）
A.丙酸睾酮
B.米非司酮
C.炔雌醇
D.醋酸氢化可的松
E.氯米芬
参考答案：B
解析：醋酸氢化可的松的化学命名为11β，17α，21-三羟基孕甾4-烯，二酮-21-醋酸脂；炔雌醇为雌激素类药物与孕激素合用有抑制排卵协同作用；米非司酮为抗孕激素，可用于抗早孕。
| 完型填空 | ||||
| Many people go to school for education. They learn languages, history, geography, physics, chemistry and math. ______(1)go to school to learn a skill so that they can ______ (2). School education is very important and useful, ______(3)no one can learn everything from school. A teacher, no matter ______ (4) he knows, cannot teach his students everything they want to know. His job is to ______(5) his students to know how to learn. He teaches them how to read and how to think. So, much more is to be learnt ______(6) school by the students themselves. It's ______(7)more important to learn how to study by oneself than to memorize some facts or rules. It is quite ______(8)to learn a fact in history or a formula(公式)in math, but it is very difficult to use a formula in ______(9)a math problem. Great scientists, ______(10) Newton, Galileo and Edison, didn't get ______ (11) from school, but they were all successful. They invented ______(12)many things. The reason for their success ______(13) that they knew ______(14)to study. They read books that were not taught at school. They worked hard ______(15)their lives, wasting not a single moment. Above all, they knew how to use their brains.
|