某吊车梁跨度6m，无制动结构，支承于钢柱，采用平板支座，设有两台起重量Q=16t/3.2t中级工作制(A5)软钩吊车，吊车跨度L=31.5m，钢材采用Q235，焊条为E43型。吊车规格如图12-7(a)所示，小车重6.326t，吊车总重41.0t,最大轮压P=22.3t。取1t=9.8kN。 吊车梁截面特性如下： A=164.64cm,y=43.6cm,I=163x10cm,W=5.19x10cm,S=2.41x10cm A=157.12cm,y=42.1cm,I=155.7x10cm,=4734cm,=3698cm

若钢轨高为140mm，a=50mm，试问，腹板上局部压应力(N/mm)，与下列何项数值最为接近？

A:88 B:98 C:104 D:108

A企业年新鲜工业用水0.9万t，无监测排水流量，排污系数取0.7，废水处理设施进口COD浓度为500mg/L，排放口COD浓度为100mg/L。

A企业去除COD是( )kg。

A:25200000 B:2520 C:2520000 D:25200

A企业年新鲜工业用水0.9万t，无监测排水流量，排污系数取0.7，废水处理设施进口COD浓度为500mg/L，排放口COD浓度为100mg/L。

A企业排放COD是( )kg。

A:6300 B:630000 C:630 D:900

丙企业建一台20t/h蒸发量的燃煤蒸汽锅炉，最大耗煤量2000kg/h，引风机风量为30000m/h，全年用煤量5000t，煤的含硫量1.5%，排入气相80%，SO的排放标准900mg/m。

丙企业总量控制建议指标为( )t/a。

A:82.44 B:68.54 C:96.78 D:67.44

化学降解法中，由于化学切割反应并非完全绝对的单一碱基特异性，因此除G,C残基外，A,T残基的位置需结合其他泳道的条带加以推断。

A残基的位置推断需结合的泳道是

A:A组 B:G+A组 C:G组和G+A组 D:C+T组 E:C组和C+T组

化学降解法中，由于化学切割反应并非完全绝对的单一碱基特异性，因此除G,C残基外，A,T残基的位置需结合其他泳道的条带加以推断。

T残基的位置推断需结合的泳道是

A:T组 B:G+A组 C:G组和G+A组 D:C+T组 E:C组和C+T组

某女性患者，45岁，因心悸就诊。查体，甲状腺右叶大小正常，左叶可触及一圆形结节，质地硬，约2cm×2cm，边界清楚，随吞咽活动，无血管杂音。T、T和TSH均正常。甲状腺显像呈热结节征象，结节周围及右叶甲状腺组织见轻度显影。

患者甲状腺素抑制试验显像见该热结节显像未见明显抑制，而结节周围和右侧甲状腺组织均不显影，如果T、T水平明显升高、TSH<0.01mIU／L。此时患者最可能的诊断是

A:Graves病 B:甲状腺癌 C:结节性甲状腺肿伴甲亢 D:甲状腺囊肿 E:Plummcr病 F:亚急性甲状腺炎

某男性患者，31岁，因“发热2周”来诊。查体：T38℃；皮肤针刺处可见大片淤斑；胸骨压痛，心、肺无异常，肝、脾不大。血常规：Hb97g/L，WBC2.2×10/L，PLT14×10/L。骨髓穿刺涂片：幼稚细胞0.91，细胞质内颗粒粗大，POX染色强阳性。

染色体检测：t（15:17）异常。其分子学靶向治疗的药物是

A:羟基脲 B:抗CD20单抗 C:阿糖胞苷 D:伊马替尼 E:维甲酸

某男性患者，21岁，1周前开始出现高热，持续不退，伴有食欲不振，大便干燥，轻度腹胀。查体：T39.2℃，P80次／分，肝肋下2cm，脾肋下1cm，血管规示WBC2.4×10/L，中性粒细胞43%，淋巴细胞57%，肥达反应："O"1：160，"H"1：320，诊断为伤寒。

病人入院15天，体温开始下降，食欲较前明显改变，无腹胀等不适。查体：T38.4℃，P84次／分。对于此时的病人来讲，下列做法错误的是

A:给予少渣、少纤维素的饮食 B:由软饭逐渐过渡到正常饮食 C:给予高热量、高蛋白、富含维生素的半流质饮食 D:避免过饱 E:避免进食生冷、不易消化的食物

Tracking Down HIV

    In the summer of 1980, a patient had a strange purplish spot removed from below his ear. It was Kaposi’s sarcoma, a rare form of skin cancer. This patient also had lymph node swelling and exhaustion. In November 1980, a Los Angelesimmunologist examined a young man who had diseases linked to immune system malfunctions. The doctor had a T-cell count taken of the patient’s blood. T-cells are a type of white blood cell that plays a key role¹ in immune responses. The patient had no helper T-cells.

    By the end of 1980, 55 Americans were diagnosed with infections related to immune system breakdown; four had died. A year later the death toll was 74. Intravenous drug users had T-cell abnormalities. People who had received blood transfusions showed symptoms of immune system breakdown. By July 1982, 471 cases of the disease, now called Acquired Immune Deficiency Syndrome (AIDS), had been reported; 184 people had died.

    In April 1984, American virologist Dr. Robert Gallo isolated the pathogen, or disease producer, responsible for² AIDS. He called it HTLV-III. InParis, Dr. Luc Montagnier identified a virus he called LAV. An international panel of scientists determined that both men had found the same virus. It became known as Human Immunodeficiency virus (HIV). Blood banks began screening for HTV in 1985, but by then about 29,000 people had been infected through blood transfusions. Some 12,000 hemophiliacs had contracted HIV through blood-clotting products. By 1995, 477,900 Americans had AIDS; 295,500 had died.

    In 1996, researchers announced drugs that reduced HIV in infected people. Today scientists are testing vaccines and believe that if HIV can be suppressed, then perhaps it can be eradicated³, but it is still a race against time.

词汇：

spot [spɒt] n. 地点，斑点，斑块，青春痘

lymph [lɪmf] n. 淋巴结

sarcoma [sɑ:"kəʊmə] n. 肿瘤，肉瘤，恶性毒瘤

exhaustion [ɪgˈzɔ:stʃən] n. 衰竭，耗尽，精疲力竭

immunologist [ɪgˈzɔ:stʃən] n. 免疫学家

malfunction [ˌmæl"fʌŋkʃn] n. 故障，失灵，疾病

count [kaʊnt] n. 计数，计算

infection [ɪn"fekʃn] n. 传染病，感染

breakdown ["breɪkdaʊn] n. 故障，衰弱，崩溃

toll [təʊl] n. 代价，死亡人数

intravenous drug n. 静脉注射药物

abnormalities [ˌæbnɔ:"mælɪtɪz] n. (abnormality的复数形式)畸形，异常情况

blood transfusion n. 输血

symptom ["sɪmptəm] n. 症状

virologist [vaɪ"rɒlədʒɪst]c n. 病毒学家

virus ["vaɪrəs] n. 病毒

panel ["pænl] n. 座谈小组，仪表板

hemophiliac [ˌhi:mə"fɪlɪæk] n. 血友病患者

vaccine ["væksi:n] n. 疫苗

注释：

1．play a key role...扮演一个关键角色，有至关重要的作用

2．be responsible for...对……负责，是……的原因

A T-cell is a ____.

A:patient’s blood B:deadly strain of tuberculosis C:white blood cell important in providing immunity to disease D:red blood cell