《安徽省劳教系统信息化建设规划》中,实现网络层面安全的手段包括()。
A、防火墙
B、入侵检测
C、网络加密
D、网络漏洞扫描
参考答案:A, B, C, D
根据下面对话 中的情景,在空白处填入适当的单词,使对话内容完整.每空一词。
A :Let's play tennis.
B: That 1________interesting. Where is your tennis?
A: It's under the desk. 2______ you have a tennis racket?
B: No,I don't.I have a soccer and a volleyball, but I 3______have a tennis racket.
A: Does your sister 4______ a tennis racket?
B: No, she 5______.She plays baseball.
A: Oh, then let's play baseball. It's fun, too.
铁的主要吸收部位是
A.胃
B.十二指肠
C.十二指肠及空肠上段
D.回肠
E.肝脏