什么是补偿器的a值。a值在最底温度时不小于何值?

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问题:

什么是补偿器的a值。a值在最底温度时不小于何值?

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Passage One

The increase in leisure time, the higher standard of living, the availability of cars to a wider range of the population and, perhaps, a broadening of personal horizons have all contributed to a drastic change in the summer week-end habits of the British publiC. Now, on most Saturdays in the months loosely called summer, it is possible to see family saloons loaded with picnics and crammed to bursting with several generations of pleasure-bent Smiths’. Like competitors in some grossly disorganized rally, they nose their way through the neat drab streets of council estates, converging on the main roads, then crawl as best they can out into the open country and towards the coast.

Congestion and the frustration of wasting precious time at the receiving end of someone else’s exhaust fumes gets the pursuit of enjoyment off to had start; tempersbecome frayed. Children, traditionally the target for fathers’ ill-humor, are singled out for special treatment. The past week’s misdeeds are unearthed and magnified out of all reasonable proportion; mothers leap to their broods’ defense and, before long, vows that never again will this outing be repeated are being hurled back and forth. Of course, by this time, the children have wisely extracted themselves from the argument and are quietly amusing themselves by looking at their irate elders or gaping at the unfamiliar sight of animals in fields, often so much stranger to them than the corresponding naked shapes they are wont to see in butchers’ windows.

Eventually, tempers partially restored, the sea is in sight. The paraphernalia of enjoyment is set up on teeming beach, sand mysteriously appears in every sandwich, pale industrial legs are exposed in self-conscious nakedness.

The children drift away, quite capable of finding enough magic in this exciting, watery world to occupy them fully until they are gathered in again. Fathers and mothers, and quite possibly some members of a previous generation, settle back to receive the sun and dream away the tensions brought to a climax by the journey. Fathers eye with furtive lustfulness and mothers glare with disapproval and envy as the shapely matrons of tomorrow splash and play and race coquettishly around them, spraying water and sand and disturbing any hopes of peace.

At length the shadows drop and chill in the air brings an end to the idyll. The lobster skin is painfully covered up and the day’s debris half-heartedly collected. The family is rounded up and the brief dreams trodden into the sand along with the wasted paper.

When they prepare to leave, they ().

A.carefully pack away the lobsters they have caught

B.put plasters on the places where they have been hurt

C.cover over their debris with waste paper

D.dress carefully to avoid any further irritation

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患者上腹部汽车撞伤3h,面色苍白,四肢厥冷,血压60/40mmHg,脉搏140/min,全腹轻度压痛、反跳痛与肌紧张,首先应考虑()

A.胃破裂

B.十二指肠破裂

C.肝、脾破裂

D.严重腹壁软组织挫伤

E.腹膜后血肿

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简单的工资处理软件,按其处理业务的范围和内容,它应该属于( )。

A.电子数据处

B.事务处理系统

C.管理信息系统

D.决策支持系统

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ZETA信用风险分析模型中用采衡量流动性的指标是( )。

A.流动资产/总资产

B.流动资产/流动负债

C.(流动资产-流动负债)/总资产

D.流动负债/总资产

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农村广泛应用的由有机质分解形成的可燃气体是(),也属于再生能源和清洁能源。

A.人工燃气

B.液化石油气

C.沼气

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