在下列开关设备中能切断短路电流的开关设备是() A.负荷开关 B.隔离开关

题型:单项选择题

问题:

在下列开关设备中能切断短路电流的开关设备是()

A.负荷开关

B.隔离开关

C.断路器

考点:动力电源动力电源题库
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下面是一位同学实验报告中的记录,其中合理的是(  )

A.用50毫升的量筒量取10毫升的液体

B.用托盘天平称得氯化钠固体质量为23.88克

C.清洗玻璃仪器后,内壁上有少量水珠即干净

D.酒精灯不用时用灯帽盖上,防止酒精挥发

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—Where is your brother?   

—He has gone to Beijing. He         back in three days.

A.will come

B.comes

C.has come

D.came

题型:单项选择题

患者男性,62岁,因“原发性肝癌,乙型病毒性肝炎后肝硬化”来诊。行原位肝移植术。术后常规免疫抑制治疗,他克莫司+吗替麦考酚酯+甲泼尼龙。术后第9日,患者的血红蛋白开始下降,胆红素逐渐上升。第11日,血红蛋白降至67g/L,血清总胆红素升至295.67mmol/L。患者呈贫血貌,乏力,皮肤巩膜黄染。急行胆道造影及胸、腹CT检查,排除胆道并发症、腹腔及消化道出血或全身感染可能。患者转氨酶持续下降,胆汁量及颜色正常,不考虑排斥反应。遂给予A型浓缩红细胞2U,术后12日,血红蛋白降至52g/L,血清总胆红素282.34mmol/L。抗人球蛋白试验(Coomb):直接抗人球蛋白阳性,间接抗人球蛋白阴性,考虑为免疫性溶血性贫血。

针对患者,可采用的治疗方法为()

A.糖皮质激素

B.输血

C.脾切除

D.免疫抑制剂

E.静脉滴注人免疫球蛋白

F.预防感染

G.去铁胺

H.保肝治疗

题型:单项选择题

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 phrase "hate crime" (Line 4, Paragraph 2) refers to the crime motivated by ______.

A. the hate for enemy


B. racial hate
C. the hate for homoerotism (同性恋)
D. the hate for the rich

题型:单项选择题

关于筛检的论述正确的是

A.真实性是指在“金标准”确诊的病人中新诊断技术检测出的阳性人数所占的比例
B.特异度是指在“金标准”确诊的非病人中筛检试验检测出的阳性人数所占的比例
C.串联试验是指先后采用几项不同的筛检方法去检测同种疾病,只有全部检测结果皆为阴性者才判为阴性
D.串联试验使灵敏度升高,特异度下降
E.以上论述均不对

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