隔离开关

入境旧机电须向检验检疫机构( )。

A．审批

B．报检

C．注册

D．办理免税证明

设X₁，X₂，…，X₉是来自正态总体X的简单随机样本，

证明统计量Z服从自由度为2的t分布．

阅读理解。

     If American customs seem strange, remember that Americans feel the same way when they visit

another country, people living in different cultures do many daily things differently from one another.

What a dull(not interesting or boring) the world would be if this were not true!

     Some differences are small, and one soon becomes used to them. For example, many people find

it strange that Americans move from place to place so often. Born in one city, they may attend school

in a second, enter business in a third, and perhaps move several times during their lives. Today, most

Americans fully expect and accept the fact that they will move frequently.

     However, houses are of great interest to Americans. They spend a lot of time thinking, reading and

talking about their homes and how to improve them. They also enjoy looking at other people's houses,

since they would enjoy visiting and examining a house in another country, they may suppose that you

will probably have the same desire(strong wish) when you visit the United States. So do not be

surprised when you visit an American family and are shown every room in the house besides the

bathroom and kitchen.

1. The first paragraph suggests that ___.    

A. customs are different from country to country

B. Americans feel uneasy when they visit another country

C. only American customs prove to be strange

D. customs are different in different times

2. According to the passage, the world would be terribly dull if___.  

A. the people all over the world spoke the same language

B. most of the world people did daily things differently from one another

C. people livin I in different countries did a lot of thing I in the same way

D. people living in various regions in the world did a few daily things in the same way

3.Most Americans think it normal that___.  

A. they do many daily things differently from one another

B. customs are different from country to country

C. the world is not dull

D. they will move frequently

4. Which of the following statement is NOT true?  

A. It takes Americans much time to think, read and talk about their houses and how to perfect them

B.You are showing all the rooms in the houses except the bathroom when you visit an American family

C. Americans perhaps move several times during their lives

D. Americans enjoy visiting others' houses

请根据所提供的资料，按照报关单填制规范的要求，在报关单相对应的栏目选项中，选出最合适的答案。

资料1：

中华人民共和国海关出口货物报关单

请根据以上资料，选择下列栏目正确选项：

“贸易方式”栏应填（）。

A．0130

B．0214

C．0110

D．0615

治疗结核菌感染的有效药物是（）

Ａ.青霉素G

C.林可霉素

B.链霉素

D.磺胺嘧啶