开门宽度的调整时：两门板密封条之间的距离应为（）。 A.1400±5mm B.140

阅读下面短文，按要求回答问题。

Until the twentieth century cigarettes were not an important threat to public health. Men used tobacco mainly in the form of cigars. Most women did not use tobacco at all.

The cigarette industry began in the 1870s with the development of the cigarette manufacturing machine. This made it possible to produce great numbers of cigarettes very quickly, and it reduced the price.

Today cigarette smoking is a widespread habit. About forty-three percent of the adult men and thirty-one percent of the adult women in the United States smoke cigarettes regularly. It is encouraging to note, however, that millions of people have given up the smoking habit. Seventy-five percent of the male population and forty-six percent of the female population have smoked cigarettes at some time during their lives, but twenty-six percent of these men and eleven percent of the women have stopped smoking. The number of persons who have given up smoking is increasing.

Men as a group smoke more than women. Among both men and women the age group with the highest proportion of smokers is the age group 24-44. Income, education and occupation all play a part in determining a person’s smoking habits. City people smoke more cigarette than people living on farms. Well-educated men with high incomes are less likely to smoke cigarettes than men with fewer years of schooling and lower incomes. On the other hand, ___________, he is likely to smoke more packs of cigarettes per day.

The situation is somewhat (有点) different for women. There are slightly more smokers among women with higher family incomes and higher education than among the lower income and lower educational groups. These more highly educated women tend to smoke more heavily.

Among teenagers the picture is similar. There are fewer teenager smokers from upper-income and well-educated families. High school students who are preparing for college are less likely to smoke than those who do not plan to continue their education after high school. Children are most likely to start smoking if one or both of their parents smoke.

小题1:How did men mainly use tobacco? (no more than 1 word)

In the form of ________________.

小题2:What were the results of the development of the manufacturing machine? (no more than 4 words)

More cigarettes are _________________________________________.

小题3:What are the three main factors closely related to one’s smoking habits? (no more than 4 words)

__________________________________________________________________________

小题4:Please fill in the blank with proper words or phrases. (no more than 9 words)

__________________________________________________________________________

小题5:Which kind of children is most likely to pick up the habit of smoking? (no more than 6 words)

Children __________________________________________ are most likely to smoke.

硫喷妥钠在体内经脱硫代谢生成

A．苯巴比妥

B．异戊巴比妥

C．司可巴比妥

D．巴比妥酸

E．戊巴比妥

固体物质以晶体状态从（）、（）或（）中析出的过程称为结晶。

我国在矿产资源勘查开发方面面临的矛盾和问题有( )。

A．经济快速增长与部分矿产资源大量消耗之间存在矛盾

B．矿产资源开发利用中的浪费现象与环境污染较突出

C．区域之间矿产资源勘察开发平衡

D．探矿权和采矿权市场体系有待进一步健全

E．矿产资源勘查、开发的市场化程度不高

在安装Linux的过程中的第五步是让用户选择安装方式，如果用户希望安装部分组件（软件程序），并在选择好后让系统自动安装，应该选择的选项是（）。

A.full

B.expert

C.newbie

D.menu