断奶前仔猪死亡的主要原因有（）、（）、（）和（）。

评估网络性能时，用户最关心的指标是 (38) 。当用排队论模型分析网络性能时，对结果影响最大的参数是 (39) 。

（39）处应填（）。

A．平均误码率

B．分组平均到达率

C．分组平均长度

D．分组平均丢失率

湿阻，脾虚湿滞的代表方是（）

A.香砂六君子汤

B.保和丸

C.平胃散

D.王氏连朴饮

E.藿香正气散

下图是一件青铜器皿——司母辛方鼎，你知道  我国是在什么时候开始制作青铜器的吗

A．西周

B．春秋

C．战国

D．夏朝

下列词语中没有错别字的一组是

A．宫阙蓝宝石珠光宝器攻城踏地

B．貂婵踩高跷伏案疾书额手称庆

C．缴税捅漏子各行其是螳臂当车

D．思辨订书机无上光荣挑肥拣瘦

Some politicians are scurrying about with much zest and anticipation. It’s time, their polls inform them, to find the quick fix for what they have determined is a society plagued by the irregular heartbeat of deficient values.

But there are contradictions that intrude on this denunciatory atmosphere. If there are moral omissions in the society, they cannot be sealed by instant, slenderly based attacks on entertainment. The plain fain fact is we are rearranging our priorities in the wrong way.

We are today misplacing our energies and our funding by directing all sorts of incentives to high schools and colleges. Too late. The moral scaffolding has been built by then, for better or worse. How then to begin this revision of life conduct We must introduce in pre-school, and keep alive through grade five, a new school course.

The course could be titled, "What is right, and what is plainly wrong. " For 30 minutes each day, the teacher would illuminate for these very young children what William Faulkner labeled "the old verities", the words that construct and implement the daily moral grind in every durable society must engage if it is to be judged a "just" society.

These are words like duty, honor, service, integrity, pity, pride, compassion and sacrifice, plus the clear admonition that violence is wrong. To the teaching of the meaning of those words must be added that cleansing rule of treating other people as you would want them to treat you. And most of all to make sure that these kids understand with growing clarity that home, school and church are the sanctuaries for their later life.

There is a grand simplicity to this kind of school course. It enters a child’s mind early, burrowing deep into those recesses of the human brain that even today advanced medical science has not been able to penetrate.

If you ask enough people, you will find that most of us remember our first-or second-grade teacher. I remember Miss Corbett and Miss Walker, who read to us before we really understood, but the words had weight and allure. We listened and, without really knowing it, we learned and saved what we learned. Perhaps it was because what we heard in those early school years was the first entry into our learning vessel.

Absent this kind of early instruction, absent the building of this moral shield, no congressional law, no presidential executive order, no fiery rhetoric will salvage a child’s conduct nor locate a missing moral core.

The author insists that children be made aware that home, school and church ().

A. can protect them against moral fall

B. can give comfort whenever they are in trouble

C. are of great help for their career success

D. are free from child abuse