按照《五金交电家电化工商品的购销合同实施办法》规定，供方错发到站、中转单位、收货单位

TTL电路为（）。

A、晶体管--晶体管逻辑电路

B、反相器

C、除法器

女性，27岁，已婚，停经49天， * * 少量出血3天伴阵发性下腹痛。检查：宫口未开，子宫与停经天数相符，本例最可能的诊断是

A．异位妊娠流产
B．葡萄胎
C．先兆流产
D．难免流产
E．不全流产

下列各组溶液，不用其它试剂就无法鉴别的是（　　）

A．Na₂CO₃、HCl、KNO₃、BaCl₂

B．NaOH、FeCl₃、KCl、H₂SO₄

C．KOH、NaNO₃、（NH₄）₂SO₄、Ba（NO₃）₂

D．NaCl、K₂CO₃、AgNO₃、Ba（NO₃）₂

For each blank, choose the best answer from the four choices and write down on the answer sheet.
(71) is a channel’ s capacity which directly reflects the data transfer rate of the channel.
(72) functions in a NetWare network which is used to define addressing schemes.
(73) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.
(74) is the popular LAN developed under the direction of the IEEE802.3.
(75) is a device which enables digital microcomputers to communicate across analog telephone lines.

A．The repeater

B．The hub

C．The bridge

D．The router

如果成本偏差和进度计划偏差相同，那么：（）。

A、成本偏差由进度偏差导致

B、偏差对项目有利

C、可以轻易的纠正进度偏差

D、劳动力价格在项目开始后上涨了