问题
多项选择题
利舍平的不稳定性主要表现为( )。
A．在空气中遇光易氧化变质
B．在金属离子催化下易发生重排
C．易被还原
D．在酸碱催化下易水解
E．含有多个甲氧基
答案
参考答案：A,D
解析： 抗高血压药
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利舍平的不稳定性主要表现为( )。
A．在空气中遇光易氧化变质
B．在金属离子催化下易发生重排
C．易被还原
D．在酸碱催化下易水解
E．含有多个甲氧基
参考答案：A,D
解析： 抗高血压药
阅读短文，将方框中的五个句子分别放在合适的位置，使短文通顺，意思完整，并将其答案填写在方框后的横线上。 Do you like to tell stories? Do you like to write? Sometimes those questions have two different answers. 小题1: . However, it can be hard to write them down on paper. 小题2: Even professional( 职业的)writers do not write everything perfectly the first time. They have to revise(修正)their work. When you revise your writing, you look for ways to change it that will make it better. 小题3: You make sure that you have used capitals(大写),periods and other punctuation marks in the best way. You look for words that can be taken out or changed for different, more exciting words. You make sure that your words help the reader get a picture in his mind when he reads them. Writing is one of those skills that take practice. The changes you make can turn boring words into exciting words. 小题4: Don`t be afraid to make changes. The first time you write on a topic ,you get your ideas down on paper. 小题5: It is making it ready for readers to enjoy.
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