搜题请搜索小程序“爱下问搜题”
问题 单项选择题

从（）开始，中国人民银行开始专门行使中央银行职能。

A．1948年1月1日 　

B．1949年10月日

C．1984年1月1日　

D．1950年8月6日

答案

参考答案：C

单项选择题

Inside the computer, the operation system (of another software module called a data communication (71) )must decide which program will get control next. Each program remember, is associated (72) . a particular front -end port. If a program’s data have not yet reached its front - end buffer, there is no point giving that program control. Thus the data communication monitor sends its own (73) signal to the front -end devices next port is polled. Note that the (74) computer speed. The computer never has to wait for a terminal or a communication line. Instead, it is the expressive front - end processor that waits for the slower system (75) to respond.

（74）处填（）。

A．great

B．huge

C．mainframe

D．large
查看答案
单项选择题

建筑外窗气密性能现场检测空气流量测量装置，当空气流量不大于3.5m³/h时，测量误差不应大于（）。

A、1%

B、5%

C、10%

D、15%
查看答案