Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）. ["lower low water","high water","low water","sea level"]
自由降落艇在收回归位后操作人员应该首先做的工作是（）。 ["挂好吊艇钩收紧吊艇索","解脱吊环存放在艇内顶棚上","解脱吊环固定在艇尾左右吊环座盒内"]
台式机硬盘通常采用哪两种接口（）。 ["PATA与IDE","IDE与SATA","FDD与SATA","PATA与FDD"]
Clearance gauges at bridges indicate （）. ["the height of the tide","depth of water under the bridge","charted vertical clearance at mean low water","distance from the water to low steel of the bridge"]
虚拟专用网（VPN）通过以下哪种方式提供数据加密（）。 ["SSL（安全套接层协议）","隧道模式","数字签名","钓鱼"]
如何处理体育锻炼中出现的低血糖症？
