非法用户企图以系统管理员的身份修改系统安全设置的事件是哪种类型的日志:()。
A.系统日志
B.安全日志
C.应用程序日志
D.网络日志
参考答案:B
从括号中选出适当的词填空。
1. We need______ (health/healthy) food every day.
2. I have an egg, an apple and an ice cream ______( for /and) breakfast.
3. Liu Xiang is a great ______ (running/run) star.
4. For dinner, he likes ______ (carrots/carrot) and salad.
5. It's important to eat______ (good/well) for runners.
白云岩的主要成分是()。
A.硫酸钙
B.氯化钙
C.碳酸镁钙
D.碳酸钙