在Access数据库中,一个关系就是一个()A.二维表 B.记录 C.字段 D.数据

题型:单项选择题

问题:

在Access数据库中,一个关系就是一个()

A.二维表

B.记录

C.字段

D.数据库

考点:中级网络工程师中级网络工程师题库
题型:单项选择题

口腔寻常狼疮一般发生于()

A.紫外线过敏者

B.结核菌素试验为阴性的个体

C.无结核病灶且免疫功能较好的青少年或儿童

D.长期使用抗生素和免疫抑制剂的个体

E.机体衰弱,抵抗力相当低下的患者

题型:单项选择题

深龋近髓,而牙髓炎症症状轻微的轻度牙髓充血的患牙最好的治疗是()

A.直接盖髓术

B.间接盖髓术

C.活髓断髓术

D.牙髓摘除术

E.失活后断髓术

题型:单项选择题

扫散法主要适用于()

A.头部

B.腹部

C.肩背部

D.四肢部

E.颈项部

题型:单项选择题

The percentage of immigrants (including those unlawfully present) in the United States has been creeping upward for years. At 12.6 percent, it is now higher than at any point since the mid 1920s. We are not about to go back to the days when Congress openly worried about inferior races polluting America’s bloodstream. But once again we are wondering whether we have too many of the wrong sort of newcomers. Their loudest cites argue that the new wave of immigrants cannot, and indeed do not want to, fit in as previous generations did.

We now know that these racist views were wrong. In time, Italians, Romanians and members of other so called inferior races became exemplary Americans and contributed greatly, in ways too numerous to detail, to the building of this magnificent nation. There is no reason why these new immigrants should not have the same success.

Although children of Mexican immigrants do better, in terms of educational and professional attainment, than their parents, UCLA sociologist Edward Telles has found that the gains don’t continue. Indeed, the fourth generation is marginally worse off than the third. James Jackson, of the University of Michigan, has found a similar rend among black Caribbean immigrants, Telles fears that Mexican Americans may be fated to follow in the footsteps of American blacks—that large parts of the community may become mired in a seemingly state of poverty and underachievement. Like African Americans, Mexican Americans are increasingly relegated to (降入) segregated, substandard schools, and their dropout rate is the highest for any ethnic group in the country.

We have learned much about the foolish idea of excluding people on the presumption of the ethnic/racial inferiority. But what we have not yet learned is how to make the process of Americanization work for all. I am not talking about requiring people to learn English or to adopt American ways; those things happen pretty much on their own, but as arguments about immigration hear up the campaign trail, we also ought to ask some broader question about assimilation, about how to ensure that people, once outsiders, don’t forever remain marginalized within these shores.

That is a much larger question than what should happen with undocumented workers, or how best to secure the border, and it is one that affects not only newcomers but groups that have been here for generations. It will have more impact on our future than where we decide to set the admissions bar for the latest ware of would be Americans. And it would be nice if we finally got the answer right.

According to the author, the burning issue concerning immigration is ().

A.how to deal with people entering the US without documents

B.how to help immigrants to better fit into American society

C.how to stop illegal immigrants from crossing the border

D.how to limit the number of immigrants to enter the US

题型:单项选择题

未来交易或事项可能产生的结果可以确认为企业的资产。( )

更多题库