特定团体的参保成员应占团体中符合参保条件成员总数的（）以上。参保条件由保险公司与投保

下列不是人体主要内分泌腺的是（）

A.下丘脑

B.腺垂体、神经垂体

C.甲状腺

D.肝脏

E.肾上腺

有关艾滋病的病因及流行现状，下列不对的是（）。

A.艾滋病是1981年才被认识的一种性传播疾病

B.是由人类免疫缺陷病毒感染引起的

C.HIV属于DNA反转录病毒

D.目前分离出来的HIV有HIV-1和HIV-2两型

E.少数患者感染后3～4周出现非特异性症状

用打气筒给自行车内胎打气，假如每打一次可压入压强为10⁵Pa的空气400×10^－6m3，要使车胎与地面的接触面积为4×10^－4m2，问要打多少次气？已知该车轮的负重为400N，内胎容积为4×10^－3m3，打气过程中气体温度保持不变(轮胎张力忽略不计)。

Many people find that regular physical activity gives them an unexpected benefit.They sleep better and wake up feeling more__61 ,in part due to increased

amounts of deep sleep. Deep sleep may play a role in the body restoring(恢)itself__62,as opposed to REM(rapid eye movement) or dreaming sleep. Researchers have found that physical exercise, especially__63 in the afternoon orearly evening,produces more__64 early in the night.

__65can also help you get a better night's sleep in a number of indirect ways. The relaxation and tiredness __66by exercise can improve sleep.

Exercise encourages weight loss and also may __67 depression. Exercising later in the day can also help delay the __68 drop in your body's temperature. The __69  of exercise are especially important for older people, __70 exercise has been shown to increase the amount of sleep senior adults get in a night and reduce the time it takes to fall asleep. But be sure you finish exercising at least 4 hours before bedtime—working out later than that could leave you too excited to fall asleep easily.

61.A. conscious      B. peaceful      C. effective      D. refreshed

62.A. physically     B. mentally      C. emotionally    D. regularly

63.A. made           B. done          C. functioned     D. conducted

64.A. night's sleep     B. dreaming sleep   C. deep sleep       D. REM

65.A. Exercise       B. Dreams        C. Researchers    D. Doctors

66.A. recovered      B. strengthened  C. caused         D. reduced

67.A. increase       B. relieve       C. release        D. arouse

68.A. nighttime      B. daytime       C. dinnertime     D. lifetime

69.A. disadvantages  B. benefits      C. ways           D. places

70.A. yet            B. if            C. when           D. Since

自身免疫性溶血性贫血患者，长期以来反复发生溶血，近1周上呼吸道感染，其后贫血日渐加速，血红蛋白50g/L，网织红细胞0．001，白细胞28×10⁹/L，分类：中性粒细胞0.52、淋巴细胞0.48，骨髓三系细胞增生减低，网状细胞、浆细胞多见，最可能是（）

A.脾功能亢进

B.急性溶血状态

C.再障危象

D.骨髓纤维化

E.以上均不是