化学热处理与其他热处理方法的主要区别是()。A、加热温度 B、组织变化 C、改变表面

题型:单项选择题

问题:

化学热处理与其他热处理方法的主要区别是()。

A、加热温度

B、组织变化

C、改变表面化学成分

考点:机械工程钢的热处理钢的热处理题库
题型:单项选择题

从下面四位作者中,选出其中一位,完成读书卡片。

                                            吴承恩     施耐庵      安徒生   莫泊桑

                                                             读书卡片

                             作者:________________________________________

                             作品:________________________________________

                             人物:________________________________________

                             与人物有关的故事:____________________________

题型:单项选择题

In only two decades Asian Americans have become the fastest-growing US minority. As their children began moving up through the nation’s schools, it became clear that a new class of academic achievers was forming. Their achievements are reflected in the nation’s best universities, where mathematics, science and engineering departments have taken on a decidedly Asian character. This special liking for mathematics and science is partly explained by the fact that Asian-American students who began their educations abroad arrived in the US with a solid grounding in mathematics but little or no knowledge of English.They are also influenced by the promises of a good job after college. Asians feel there will be less unfair treatment in areas like mathematics and science because they will be judged more objectively. And the return on the investment in education is more immediate in something like engineering than with an arts degree.

Most Asian-American students owe their success to the influence of parents who are determined that their children take full advantage of what the American educational system has to offer. An effective measure of parental attention is homework. Asian parents spend more time with their children than American parents do, and it helps. Many researchers also believe there is something in Asian culture that causes success, such as ideals that stress family values and emphasize education.

Both explanations for academic success worry Asian Americans because of fears that they feed a typical racial image. Many can remember when Chinese, Japanese and Filipino immigrants were the victims of social separation. Indeed, it was not until 1952 that laws were laid down giving all Asian immigrants the right to citizenship.

小题1:. While making great achievements at college, Asian-American students ________.

A.feel they are mistreated because of limited knowledge of English

B.are afraid that their academic successes bear a strong Asian character

C.still worry about unfair treatment in academic areas

D.generally feel it a shame to have to depend on their parents小题2:. What are the major factors that determine the success of Asian Americans?

A.Solid foundation in basic mathematics and Asian culture.

B.Hard work and intelligence.

C.Hard work and a limited knowledge of English.

D.Asian culture and the American educational system.小题3:.Few Asian-American students major in human sciences mainly because_________.

A.their English is not good enough

B.they are afraid they might meet with unfair judgment in these areas

C.there is a wide difference between Asian and Western cultures

D.they know little about American culture and society小题4:. The author’s tone in this passage is __________.

A.sympathetic

B.doubtful

C.critical

D.objective

题型:单项选择题

热水供暖系统发生气阻的排除方法是管道安装应保证干管的()。

A、高度

B、坡度与坡向

C、位置和质量

D、长度

题型:单项选择题

英、法、美三国资产阶级革命发生的共同原因是

A.专制王权同议会矛盾斗争的结果

B.受到封建专制制度的阻碍

C.资本主义经济的发展受到严重阻碍

D.殖民压迫激起人民强烈反抗

题型:单项选择题

女,46岁,乙肝表面抗原阳性,USG发现肝内11cm×13cm大小的肿块,CT增强扫描动脉期病灶边缘出现不规则高强化,静脉期图像显示病灶明显缩小,中心可见裂隙样低密度区。

为明确诊断应首先采用以下哪种处理方法()

A.CT延迟扫描

B.MRA

C.CT三维后处理

D.经皮穿刺活检

E.CT灌注扫描

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