滚筒上缠绕2层或2层以上钢丝绳时,其边缘高出最外层钢丝绳的高度为绳径的()倍。
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Which statement about the Lightweight Access Point Protocol (LWAPP) is true? ()
A. LWAPP encrypts both control traffic and user data.
B. LWAPP encrypts user traffic with an x.509 certificate using AES-CCM
C. When set to Layer 3, LWAPP uses a proprietary protocol to communicate with the Cisco Aironet APs.
D. LWAPP encrypts control traffic between the AP and the controller.
E. None of the other alternatives apply.
产生人绒毛膜促性腺激素的主要部位是()妊娠10周后,产生雌三醇的主要部位是()
A. 胎膜
B. 卵巢黄体
C. 叶状绒毛膜
D. 胎儿胎盘单位
E. 胎盘合体滋养细胞
根据《招标投标法》规定,招标单位发出中标通知书之日起()日内与中标单位签订合同
某10kV线路经计算后确定加装容量为Qc的电容器组以提高功率因数。电容器装置的分组回路,宜设置()保护。
A. 操作过电压
B. 过电流
C. 纵差
D. 横差