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问题 单项选择题

1949年10月20日，（）正式挂牌开业，标志着中国现代保险事业的创立，开创了中国保险的新纪元。

A.中国人寿保险公司

B.中国人民保险公司

C.中国再保险公司

D.中华联合财产保险公司

答案

参考答案：B

单项选择题

下面哪种毒品属于新型毒品（）。

A、鸦片

B、海洛因

C、K粉

D、吗啡
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单项选择题

User programs interact with the kernel through a set of standard (71) . They request services to be provided by the kernel. Such services would include accessing a file: open close, read, write, link, or execute a file; starting or (72) accounting records; changing ownership of a file or (73) ; changing to a new directory; creating, (74) , or killing a process; enabling access to hardware devices; and setting limits on system resources. Unix is a multi -user, multi -tasking operating system. You can have many users logged into a system simultaneously, each running many programs. It’s the kernel’s job to keep each process and user separate and to regulate access to (75) , including cpu, memory, disk and other L/O devices.

A．system commands

B．system transfer

C．system calls

D．system rings
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