关于UNIX的系统结构错误的是( )。A．结构上UNIX分为操作系统内核与核外程

An old woman went out shopping last Tuesday. She came to a bank and saw a car near the door. A young man with dark glasses got out of it and went into the bank. She looked into the car and found some keys in it.

The man took a gun(枪)out of his pocket and said to the man in the bank, “Give me all the money.” But the woman didn’t see this. She went to the young man and put the keys in his hand, “My boy,” she said, “Don’t leave your keys in your car! Someone is going to steal(偷) it.”

The young man looked at the old woman for a few minutes. Then he took his keys, ran out of the bank, got into his car and drove away quickly without taking any money.

小题1:The old woman went out to _____.

A．work

B．do some shopping

C．the bank

D．play小题2:The young man went into the bank and tried to ______

A．rob the bank

B．steal some money

C．borrow some money

D．see his friends小题3:The young left his keys _____

A．in the car

B．on the street

C．in his pocket

D．in the bank小题4:When the young man got his keys ,he was very____

A．glad

B．surprised

C．excited

D．frightened

依次填入下面横线处的词语，最恰当的一组是[ ]

（1）今年1月1日，中国26年来粮食接受联合国______的历史画上了句号。

（2）“保卫钓鱼岛”网站遭受黑客袭击，______仍在修复当中。

（3）帕金森病是常见的中老年神经系统疾病，拳王阿里就患有______病。

A．馈赠 日前 该

B．捐赠 目前 该

C．馈赠 目前 本

D．捐赠 日前 本

陆上运输货物保险的责任起讫采用()条款的规定。

A.仓至仓

B.门至门

C.装车至卸车

D.站至站

公路横断面一般没有，而城市道路横断面一般有的是（）。

A.分隔带

B.人行道

C.机动车道

D.非机动车道

E.边坡

F.绿化带

某县要了解该县小学六年级学生语文理解程度是否达到及格水平（60分）。为此，从全体六年级学生中用简单随机放还抽样方法抽取了400人进行测试，得到平均成绩61.6分，标准差14.4分。要根据样本数据对总体参数的论断值（语文理解程度的期望值60分）作显著性检验，显著水平先后按α＝0.05和α＝0.01考虑。请就上面的工作任务回答下列问题：

指出出现这种差异的两种可能的原因是什么？