ES不具有的功能是（）
A.咨询功能
B.教育功能
C.学习功能
D.决策功能
AI搜题
NEW
搜题
第1题
A. INMARSAT-C.只有第2，3类SES具有EGC的接收功能
B. 接受EGC报文的INMARSAT-CSES也要作PVT（或LINKTEST）测试
C. 接收主EGC报文的INMARSAT-CSES要先作login
D. A.B和C都不正确
第2题
A、具有很好的吸附选择性It has good adsorption selectivity
B、如用于脱水的3?、4?分子筛For example, 3A and 4A molecular sieves used for dehydration
C、3?分子筛：只允许H2O（2.3-3.1?）、CH4等直径小于3?的分子进入孔道（不吸附C2+烃）3A molecular sieve: only H2O (2.3-3.1a), CH4 and other molecules with diameter less than 3A are allowed to enter the pore (C2+ hydrocarbon is not adsorbed)
D、4?分子筛：只允许H2O（2.3-3.1?）、CH4 、 C2H6 等小于4?的分子进入孔道（不吸附C3+烃）4A molecular sieve: only H2O (2.3-3.1a), CH4, C2H6 and other molecules less than 4A are allowed to enter the pore (C3+ hydrocarbon is not adsorbed)
E、3?、4?分子筛有利于从烃类气体中选择性吸收水分，而5?则允许各种直链烷烃进入孔道吸附，故用于脱水选择性较差。 Molecular sieves 3A and 4A are favorable for selective absorption of water from hydrocarbon gases, while 5A allow various straight-chain alkanes to enter channels for adsorption, so they are less selective for dehydration.
F、具有很高的吸附性能It has high adsorption properties
G、很低的水汽分压，高温、高气体线速度等较苛刻条件下，仍保持较高的湿容量（其内部比表面积600～1000m2/g，大于一般吸附剂）。Low partial pressure of water vapor, high temperature, high gas linear velocity and other harsh conditions, still maintain a high wet capacity (its internal specific surface area of 600 ~ 1000m2/g, greater than the general adsorbent)
H、湿容量随温度变化小，在较高温度下仍有高吸附能力，实际使用时虽然经过反复再生，仍可以基本保持不变。The moisture capacity changes little with the temperature, and it still has a high adsorption capacity at a higher temperature. In practical use, it can remain basically unchanged despite repeated regeneration.
I、具有很高的脱水能力，对天然气水露点可降至-98℃，适用于天然气深冷法轻烃回收与液化前深度脱水。It has a very high dehydration capacity, and the dew point of natural gas water can be reduced to -98℃, which is suitable for deep dehydration before natural gas cryogenic light hydrocarbon recovery and liquefaction.
