Which two statements about VPNv4 address are true？ （） ["The VPNv4 address is 128 bits long with a 128-bit long subnet mask","The VPNv4 address consists of an RD and an IPv4 address","The VPNv4 address is 96 bits long with a 64-bit long subnet mask","The VPNv4 address is 128 bits long with a 64-bit long subnet mask","The VPNv4 address consists of an RT and an IPv4 address","The VPNv4 address is 96 bits long with a 32-bit long subnet mask"]
为什么说异步电动机的三相原始数学模型不是物理对象最简洁的描述？
我国学者对教学过程本质问题作了一些研究，可以归纳为以下四类（）。
在VOIP中，需要通过DSP实现模拟信号到数字信号的转换，我们要实现对模拟信号的采样，如下图；根据Nyquist理论我们采样的频率是最大频率的2倍就基本可以接受，我们采样的频率是多少呢？（） [" 2000 samples per second"," 4000 samples per second"," 8000 samples per second"," 12，000 samples per second"]
简述污染物质的生物迁徙转化途径。
金融行为学
