中 * * 驻地由上海——瑞金——延安——西柏坡——北平，从一个侧面反映了中国民主革命的进程。下列相关表述正确的是
①从上海到瑞金，有利于井冈山革命根据地的建立
②从瑞金到延安，有利于国内战争向抗日战争的转变
③从延安到西柏坡，反映了解放战争形势发生了变化
④从西柏坡到北平，反映了工作重心由城市到乡村的转移[ ]
A．②③
B．①②
C．①④
D．③④
答案：A
| 35．Applications put computers to pratical business (1) , but below the (2) it’s the heart of an operating system—the kernel that provides the technical wizardry to juggle multiple program, connect to networks and store (3) . A traditional kernal provides all the functions for applications. The kemal (4) memory, I/O devices and parcels out processor time. The kernel also supports security and fault (5) , which is the ablity to recover automatically when parts of the system fail. |
(4)
A．manages
B．manage
C．managed
D．managing