电子商务网站安全性能主要包括:()
A.保密性
B.完整性
C.可使用性
D.人员安全
参考答案:A, B, C
根据汉语或首字母提示完成单词。
1. Wang Ming is the _______(队长) of our school basketball team.
2. Can you r________ Tony's telephone number? I want to call him.
3. -- Do you know the p_______ over there?
-- Yes, he is our math teacher.
4. Lisa is of medium ________(体格), and she has curly hair.
5. Young boys and girls all like listening to p_______ music.
煤与瓦斯突出前,在瓦斯涌出方面的预兆有下列哪些?()
A、瓦斯忽大忽小
B、喷瓦斯
C、哨声
D、喷煤等