具体来说，在训释词义方面比较重要的文例有哪些？
参考答案：1）连文例；
2）对文例；
3）异文例；
4）用词惯例；
5）行文通例。
根据句意和首字母提示填空。
1. Stop f________! You are classmates.
2. Jim a________ late for class yesterday.
3. Two women are talking o________.
4. Look, these are our school r________.
5. She often w________ to work, she thinks it's good for her health.
按满足电压要选取直流电回路的导线时，直流放电回路全程压降不应大于下列值，-48V电源为（）
A.1.6V
B.3.2V
C.1.8V
D.2.4V
