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【简答题】
(-1)×(-1)×(-1)×…×(-1) (2n+1) =______．（n为正整数）
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举一反三
【单选题】患者，男性，40岁，司机，既往体健，2个月前无明显诱因出现腰背部疼痛，休息时症状减轻，劳累时加重。3天前腰部扭伤后疼痛加剧并向左下肢放射。检查：腰部外观正常，弯腰活动受限，第4、5腰椎棘突上和棘突间有压痛。 此患者最可能的诊断是
A.
腰椎结核
B.
腰椎间盘突出症
C.
腰椎管狭窄症
D.
腰部肌筋膜炎
E.
急性腰扭伤
【单选题】关于标准公差说法错误的是( )
A.
标准公差值得大小与公称尺寸和公差等级有关，与零件是孔还是轴无关。
B.
公称尺寸相同，公差等级越高，标准公差值越小。
C.
公称尺寸越大，标准公差值越大。
D.
公差等级相同，则加工精度相同。
【简答题】给出下列生物药物的中文名称:IFN;TNF;IL;G－CSF;EPO;GM－CSF;r－SK;r－SAK;GH;EGF;bFGF;rhTPO;t－PA;SRM。
【单选题】Which of the following is the best example of writing that is likely to be subject to the kinds of 'handicaps' referred to in line 39?
A.
A history of an auto manufacturing plant written by an employee during an auto-buying boom.
B.
A critique of a statewide school-desegregation plan written by an elementary school teacher in that state.
C.
A newspaper article assessing the historical importance of a United States President written shortly after the President has taken office.
D.
A scientific paper describing the benefits of a certain surgical technique written by the surgeon who developed the technique.
E.
Diary entries narrating the events of a battle written by a soldier who participated in the battle.
【单选题】男性患者，58岁，休息时突然出现右侧肢体无力，继而出现呼之不应。查体：深昏迷，压眶无反应，左侧瞳孔大于右侧瞳孔，血压24/12kPa。治疗首先考虑
A.
催醒
B.
降血压
C.
抗感染
D.
降颅压
E.
吸氧
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