对在建工程项目发生的净损失，如果为管理不善等原因造成的，则将扣除过失人的赔款和保险公

袋中有5个大小相同的球，其中3个是白球，2个是红球，一次随机地取出3个球，其中恰有2个是白球的概率是（）。

A．A

B．B

C．C

D．D

Frame Relay is simplified form of (71) , similar in principle to (72) , in which synchronous, frames of data are routed to different destinations depending on header information . Packets are routed throught one or more Virtual Circuits known as (73) . Most Virtual Circuits are (74) ,which means that the network provider sets up all DLCI connections at subscription time. (75) are also part of the Frame Relay specification . They privide a link that only lasts only as long as the session.

A．X.21

B．X.25

C．X.28

D．X.29

男，61岁，拟在硬膜外阻滞下行胆囊切除术，硬膜外穿刺成功后，给予试验量2%利多卡因3ml+初量0.75%布比卡因10ml，并静注氟哌啶2.5mg、哌替啶50mg、咪达唑仑1mg辅助麻醉。麻醉满意。进腹探查时发生窦性心动过缓。

首选的处理措施应是

A．阿托品0.5mg，iv
B．异丙肾上腺素5μg，iv
C．提高吸入氧浓度
D．麻黄碱10mg，iv
E．麻黄碱20mg，iv

柴油精滤器为串联复式滤清器，第一级为（），第二级为纸滤芯。

A、毛毡滤芯

B、金属滤芯

C、粗滤

D、杯式滤芯

组织的基本作用有：人力汇集和放大、（）和满足人们心理需要。