学习教育法学是（）的需要。 完善教育法学科。 调整人们之间的相互关系。 深入了解现行教育法。 促进依法治教。
危险性
Which statement about the Lightweight Access Point Protocol （LWAPP） is true？（） LWAPP encrypts control traffic between the AP and the controller.。 LWAPP encrypts user traffic with a x.509 certificate using AES-CCMP。 LWAPP encrypts both control traffic and user data.。 When set to Layer 3， LWAPP uses a proprietary protocol to communicate with the Cisco Aironet APs.。
Which three statements about end-to-end delay are true？（） End-to-end delay is the sum of propagation delays，processing delays，serialization delays，and queuing delays.。 Coast-to-coast end-to-end delay over an optical link is about 20 ms.。 Processing delay depends on various factors，which include CPU speed，CPU utilization，IP switching mode， and router architecture.。 Propagation and serialization delays are related to the media.。 Propagation delay is the time it takes to transmit a packet and is measured in bits-per-second （bps）.。 Serialization delay is the time it takes for a router to take the packet from an input interface and put it into the output queue of the output interface.。
同一基因型不因环境条件改变而产生不同表型。
下列说法正确的是（）
