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油气层中常见的粘土矿物对油气层水敏性损害最强的是（）。
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在临修更换轮对时，同转向架最大与最小车轮直径差正确的说法是（）
You manage a software update infrastructure by using Windows Server Update Services (WSUS) 3.0. All client computers run Windows XP Professional Service Pack 3 (SP3). The client computers receive Automatic Updates from the WSUS server, and they are configured to install Automatic Updates immediately. From the Update Services console, you approve a required security update for all client computers. You need to force a client computer to apply the required security update as soon as possible. Which tool should you use? （）
躲避龙卷风最安全的地方是（）。
备用列尾主机电池、司机便携控制台电池应至少（）充放电一次。
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