XY为定点二进制数，其格式为1位符号位，n位数值位。若采用Booth补码一位乘法实现

阅读下面短文，根据要求完成下列各题。

    Marco Polo was born in Venice in 1254. He was the most famous foreigner to visit Asia during the

Middle Ages. He wrote a book about his travels. In his book he wrote all the things he saw and heard.

Many people in the west read the book, but few believed what Marco Polo said in the book. He told

stories about a lot of strange people and places. But at that time nobody knew these places and the

people.

    When Marco Polo was still very young, he decided to travel together with his father. It took them

more than three years to travel to China, later he became a friend of the Chinese emperor (皇帝). He

learned to speak Chinese when he traveled around, and he talked to many people in Chinese. The emperor

liked him and made him a Chinese Official. At that time Marco Polo was only thirty years old. After nearly

seventeen years' travel in the east, Marco and his father wanted to go back home.

    When Marco and his father arrived in Venice many years later, their family and friends saw them again.

They couldn't believe their eyes because Marco and his farther were quite old. Marco Polo and his father

had been away for almost 25 years.

1. Marco Polo was                foreigner who ________ to Asia during the Middle Ages.

2. Marco Polo wrote a famous book ________ "The Travels of Marco Polo". He told people _______

    he saw and heard in the book.

3. Many people in the west read the book, but ________ believed ________.

4. It took Marco Polo and his father over three years to ________. And Marco Polo worked as in

    1284.

5. Marco Polo and his father had been away _______. When they got back home in Venice, they

    were _______.

以上各项，属月经过少与月经过多共同病因的是（）

A.血瘀

B.血热

C.气滞

D.气虚

E.血寒

下列选项中，不属于行政公文的是()。

A．命令

B．计划

C．通知

D．请示

流行病学实验的主要用途没有（）

A.探讨疾病的病因

B.预防措施的效果与安全性评价

C.了解疾病的患病情况和分布特点

D.评价某种新药、新方法或新制剂的效果

E.医疗保健措施质量成本效果、成本效益评价

国土资源监督检查工作应当遵循什么原则？