问题
单项选择题
脊髓的被膜由外向内依次为
A．蛛网膜、硬脊膜、软脊膜
B．硬脊膜、蛛网膜、软脊膜
C．软脊膜、硬脊膜、蛛网膜
D．硬脊膜、软脊膜、蛛网膜
E．软脊膜、蛛网膜、硬脊膜
答案
参考答案：B
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脊髓的被膜由外向内依次为
A．蛛网膜、硬脊膜、软脊膜
B．硬脊膜、蛛网膜、软脊膜
C．软脊膜、硬脊膜、蛛网膜
D．硬脊膜、软脊膜、蛛网膜
E．软脊膜、蛛网膜、硬脊膜
参考答案：B
| 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. |
(2)
A．amount
B．amounted
C．mount
D．mounted