搜题请搜索小程序“爱下问搜题”
问题 单项选择题

(四) 综合安全技术

在生产过程中能够产生和散发热量的生产设备、产品或工件等统称为( )。

A．强热辐射源

B．定向辐射场所

C．生产性热源

D．高频热源

答案

参考答案：C

单项选择题

下列哪项因素导致脉搏血氧饱和度偏高（）

A.组织低灌注

B.低温状态

C.指甲有指甲膏或其他覆盖物

D.存在高铁血红蛋白血症

E.严重贫血
查看答案
单项选择题

A local-area network (LAN) is a communications network that (125) a variety of devices and provides a (126) for information exchange among those devices. The scope of the LAN is small typically a single building or a cluster (丛) of buildings. The LAN is usually owned by the same organization that owns the (127) devices. The internal data rate of LAN is at least several Mb/s.

The basic of LAN communication is broadcasting. At each station, there is a transmitter/receiver that communicates over a (128) shared, By other stations. A transmission from any one station is (129) to and received by all other stations.

（125）是（）

A.broadcast

B.cable

C.control

D.interconnects

E.internet

F.meander

G.means

H.medium

I.modem

J.output switch relay
查看答案