问题
单项选择题
观测时平均风速3米/秒，突然增加到12米/秒，而且维持了3分钟，这种现象是（）。
A、大风
B、阵风
C、龙卷
D、飑
答案
参考答案：D
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观测时平均风速3米/秒，突然增加到12米/秒，而且维持了3分钟，这种现象是（）。
A、大风
B、阵风
C、龙卷
D、飑
参考答案：D
| 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．get
B．make
C．push
D．put