事件监视器包含在______包中。
A.java.util B.java.awt.happenC.java.awt.event D.java.awt.look
参考答案:C
填空题。
1. One and one is _____.
2. Three and two is _____.
3. Seven minus (减) four is .
4. Eleven minus seven is .
5. Fourteen minus eight is _____.
动物产品中的兽药残留来自于哪里?