问题 单项选择题

对于105m3/d的重油催化裂解制气炉,日消耗制气用重油65.4t/d。油煤气热值为18900kJ/m3,重油的热值为41800kJ/kg,则该重油制气炉的气化效率为()。

A.65.6%

B.69.1%

C.72.5 %

D.75.6%

答案

参考答案:B

解析:

[题解] 重油制气炉的气化效率为:

多项选择题 案例分析题

患者男,85岁,因“咳嗽、气短伴乏力2周”来诊。病程中有发热,体温最高37℃,盗汗。既往有双下肢静脉血栓、肺动脉栓塞、高血压、冠心病、稳定型心绞痛等病史。查体:浅表淋巴结不大,肝、脾肋下未触及,双下肢水肿。血常规:Hb128g/L,RBC3.71×10/L,WBC4.9×10/L,N0.47,L0.42,PLT62×10/L。腹部超声:脾厚5.6cm,长径16.2cm,未见占位。胸部CT:右侧椎旁膈肌脚紧贴T椎体见弧形软组织密度影,CT值29HU,慢性支气管炎、肺间质纤维化,左下肺前内基底段斑状影,双侧肺门不大,纵隔淋巴结无增大,胸腔积液征(-)。

关于患者的诊断、分期及预后等,叙述正确的有()(提示血清LDH1260U/L(正常值<250U/L)。全身PET-CT:多个部位淋巴结肿大,伴异常放射性浓聚;右侧膈脚处软组织肿物,伴异常放射性浓聚;全身骨髓代谢异常增高;脾大,伴异常放射性浓聚;上述异常放射性浓聚SUVmax7.8~18.64。骨髓穿刺:异常淋巴样细胞明显增多,达50%,体积偏大。骨髓活检:骨髓被淋巴样细胞弥漫浸润,骨髓单个核细胞免疫分型示异常增多的B淋巴细胞。左侧腹股沟淋巴结穿刺活检:淋巴结正常结构消失,代之以弥漫浸润的大的淋巴样细胞伴较多核分裂象,免疫组织化学示异型细胞Bcl-2(+)、Bcl-6(-)、CD10(-)、CD20(++)、CD79α(++)、Ki-67(+,>80%)、LCA(+)、MUM(+)。)

A.诊断为弥漫性大B细胞淋巴瘤

B.临床Ⅳ期

C.IPI5分,高危组

D.淋巴瘤累及骨髓

E.有B症状

F.预后差

完形填空

Recent studies show that many young people in the United States never finish high school.Some researchers say about fifteen to twenty percent of public school students do not complete their education.But many other experts and policymakers believe that for the past twenty years,the dropout rate has been around thirty percent.For Latino and black students,the numbers are even higher.Researchers say almost half of them leave schoo1.At the same time,almost half the states let students leave school before the age of eighteen without letting their parents know.

Finding a good job without a high school education is _________.A recent study found that almost half of all dropouts aged sixteen to twenty—four did not have a job.The lack of high school education can also lead to other problems.An estimated two—thirds of prisoners in the United States dropped out of high schoo1.

The main reason why many students drop out of school is that they are failing.Many are bored with their classes or feel disconnected from their school and teachers.Some students feel that educators place low expectations on them.

There have been efforts to increase graduation rates through education reforms during the past twenty years.Some communities are working on dropout prevention programs.These include alternative (其他的) high schools to meet special needs.In addition,experts suggest “early warning systems’’ to help identify young school children at the risk of dropping out of high schoo1.They say schools should also keep regular contact with parents,especially if their children are missing school often.

小题1:What is the best title of the passage? (Please answer within 10 words.)

                                                                          

小题2:Which sentence in the passage can be replaced by the following one?

Many students feel tired of their classes or don’t feel connected with their school and teachers.

                                                                         

小题3:Please fill in the blank in Paragraph 2 with proper words or phrases to complete the sentence.(Please answer within 10 words.)

                                                                       

小题4:What do you think is the most important reason for the high dropout rate in the high school?(Please answer within 30 words.)

                                                                      

小题5:Translate the underlined sentence in the last paragraph into Chinese.