4、元朝设宣政院，管辖的地区是

A．澎湖和琉球　　　 B．河北、山东　　　 C．西藏　　　　 D．岭北

3、孔子在修订《春秋》时，同记战争，有伐、征、侵等区别，同记杀人，有杀、弑、歼等不同表达方式，这被称为“春秋笔法”。这表明　

　 A．文字史实总带有主观因素　　　　 　　B．写史者总对战争杀人津津乐道

　 C．历史是个人心态的反映　　 　 　　　　D．非实迹史料不能反映历史真实

2、黄仁宇在论及西汉的统治政策时写道：“新朝代遇到的第一个大问题是帝国跨地过广，不能全部由中央集体管制，于是采取了一种‘斑马式’的省级组织。”这里“‘斑马式’的省级组织”是指

A．郡县制 　　　　　　　　 　 B．封国制与郡县制并存　

C．州郡县三级交错管理　　　　　 　　　　　 D．行省制度

1、右图是湖南省博物馆“凤舞九天”展览展出的王子午铜鼎，铭文中写有“王子午自铸铜鼎，以祭先祖文王，进行盟祀”。青铜器多作祭祀礼器的主要原因是　

15. Suppose that salaries of teachers are normally distributed. If 80% of teachers earn more than $55000 per year, and 10% of teachers earn more than $75 000 per year, find then the mean and the standard deviation of teachers’ salaries.

14. Suppose that X is normally distributed with a mean of 34.3 and a standard deviation of 6.2. Find a value of c, such that Pr(34.3 - c < X < 34.3 + c) = 0.90.

13．The bus company has established that the average time taken for a bus to complete its journey from the depot to the final destination is 57 minutes. It is found that on 25% of occasions the bus takes more than 65 minutes to do the trip. Find the standard deviation of length of trip.

12. A machine that fills milk bottles must be set so that 98% of the time, there is at least 1 L of milk in a bottle. The amount dispersed by the machine is normally distributed, with a mean equal to the setting of the machine and a standard deviation of 2 mL. The machine should be set closest to:

A995 ml　　 B 996 mL　　 C 1000 mL　　 D 1004 mL　　 E 1005 mL

11. The marks achieved by Amy in Japanese, Art and Physics, together with the mean and the standard deviation for each subject are given in the following table:

Which of the following statements is correct?

A Amy’s best subject was Japanese, followed by Art and then Physics.

B Amy’s did equally well in Japanese and Art, followed by Physics.

C Amy’s best subject was Japanese, followed by Physics and then Art.

D Amy’s best subject was Physics, followed by Japanese and then Art.

E Amy’s best subject was Art, followed by Physics and then Japanese.

10. If X is normally distributed random variable with mean 50 and standard deviation 10, and Z is the standard normal random variable, then the interval shaded in the diagram below can be written as