问题
选择题
丙烯醇（CH2=CH-CH2OH）可发生的化学反应有 [ ]
①加成 ②氧化 ③酯化 ④加聚 ⑤取代
A．只有①②③
B．只有①②③④
C．①②③④⑤
D．只有①③④
答案
答案：C
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丙烯醇（CH2=CH-CH2OH）可发生的化学反应有 [ ]
①加成 ②氧化 ③酯化 ④加聚 ⑤取代
A．只有①②③
B．只有①②③④
C．①②③④⑤
D．只有①③④
答案：C
| 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. |
(5)
A．management
B．planning
C．production
D．research