女性，70岁，5年前经过超声心动图诊断为扩张型心肌病，平时无症状。该患者应当长期服用

患者，男，42岁，因咽痛4日，伴发热就诊。患者4日前无明显诱因出现咽痛，程度较剧烈，吞咽时尤为明显，伴发热，但无声嘶及呼吸困难。临床检查见：一般情况可，无明显呼吸困难，说话时似口中含物；左侧腭舌弓显著充血隆起，扁桃体不大，被推向内下方。

如病情进一步发展，可能出现的并发症有哪些（）

A.咽旁脓肿

B.喉水肿

C.颈部坏死性筋膜炎

D.坏死性纵隔炎

E.颈内静脉血栓

F.化脓性淋巴结炎

G.败血症或脓毒血症

决定空间分辨率的主要因素是（）

A.扫描方式

B.有效视野

C.重建矩阵

D.显示矩阵

E.探测器数目

呕吐：

True, some of the attacks against whites by blacks are for money and valuables. But, others ale revenge assaults by blacks for a real or imagined racial insult. It is equally true that the vast majority of violent crimes against whites are committed by whites, while the vast majority of violent crimes against blacks are committed by other blacks. Yet even after discounting crimes that are hastily and erroneously (错误地，不正确地) tagged as racially motivated, many blacks do attack whites because they all white. A 1998 Justice Department study confirmed that nearly 20% of the more than 4,000 hate crimes well committed against whites, and their attackers were blacks. The Southern Poverty Law Center also notes that there is a huge escalation in black-on- white violence from nearly none at the beginning of the 1990s.
A collection of white supermacists and rightist extremist groups have eagerly made black-on- white violence a wedge issue in their movement to paint blacks as the prime racial hate mongers in America. The New Century Foundation, an ultra-conservative think-tank, has launched a full- blown national campaign to alert whites to the danger of black hate crimes. These groups and individuals magnify hate crimes by blacks in order to back their social agenda. They oppose affirmative action programs and per hate crime laws. They downplay, or justify, the proliferation of white-supremacist-tinged paramilitary groups, police violence, and racial profiling. And they lobby hard for more prisons, police, and tougher laws.
Black-on-white violence also reinforces white fears of blacks as the ultimate menace to society. When blacks say or do nothing about these attacks, it is taken by some as a tacit signal that blacks put less value on white lives than black lives. This is a terrible price for black silence on hate crimes committed by blacks.

The best topic of this passage is ______.

A. Black and White
B. Black-on-White Violence
C. Security Is an Illusion
D. White Supremacists and Rightist Extremist Groups

大型机头的分流器内还设臵了（），以便于熔料塑化均匀。