3. Viruses can be written into the program and files, and can destroy the infected computers.
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4. You can dowhateveryou want overthe Internet, and the government can't handle theproblems.
A. 对
B. 错
If you can't take a correct attitude t the Internet, it will distract you from yourstudy, and you can get attitude to it.
A. 对
B. 错
喜树野生资源是我国珍稀濒危物种,1999年8月经国务院批准列为第____批国家重点保护野生植物,
喜树分布于我国____流域及西南各省和印度部分地区,台湾、广西、河南等有人工栽培。