| We all know that the normal human daily
cycle of activity is of some 7～8 hours’ sleep alternating with some 16～17 hours’
wakefulness and that, broadly speaking, the sleep normally coincides with the
hours of darkness. Our present concern is with how easily and to what extent
this cycle can be modified. The question is no mere academic one. The ease, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls for round-the-clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness, Sleeping during the day and working at night. Unfortunately, it is often the case in industry that shifts are changed every week: a person may work from 12 midnight to 8 a. A. has just been awake from sleep. B. can not work night shifts. C. should go to sleep at once. D. is less productive. [单选题] 第236题电缆及电容器接地前应逐相充分放电,星形接线电容器的中性点应接地,串联电容器及与整组电容器脱离的
电容器应()。 A.全部接地 B.单只接地 C.充分放电 D.逐个充分放电 [单项选择]（），36，19，10，5，2。
A. 76 B. 69 C. 53 D. 47 [单项选择]老年抑郁症发作最危险的病理意向活动是（）。
A. 自杀企图和行为 B. 情感低落 C. 思维障碍 D. 意志活动减退 E. 躯体或生物学症状 [多选题]对突发事件的处理对策包括（ ）。
A.逃避 B.评估 C.控制 D.解决 E.应变 [多选题]更换钢轨需拆装扼流变钢轨引线时，拆装作业不应由（ ）完成。
A.电务人员 B.工务人员 C.供电人员 D.通信人员 [填空题]凡是由（）引起，具有一定潜伏期和临床表现，并具有传染性的疾病称为传染病。
[单项选择]取粉末少量加清水调和，涂于指甲上，能“挂甲”的药材是（）
A. 鹿茸 B. 蟾酥 C. 羚羊角 D. 牛黄 E. 僵蚕 [单选题]粒红比值减低最常见的疾病是
A.化脓性感染 B.溶血性贫血 C.类白血病反应 D.慢性粒细胞白血病 E.急性淋巴细胞白血病 [单项选择]下列哪些工作安排是容许的？（）
A. 安排未成年工从事水银温度计充灌水银的作业 B. 安排已婚待孕女职工在苯浓度超过卫生标准3倍的作业场所作业 C. 安排怀孕六个月以下女职工加班 [单选题]380V架空绝缘导线对建筑物的最小垂直距离是多少()m。
A.1 B.1.5 C.2 D.2.5 [多选题]经济全球化的表现( )。
A.国际分工进一步深化 B.贸易全球化 C.金融全球化 D.企业生产经营全球化 [判断题]装卸人员可以通过叉车上到货车上 ( )
A.正确 B.错误 我来回答: 提交
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