Climate, more than any other single
factor, determines the distribution of life on earth. Climatic boundaries
establish the limits which organisms can survive. Plants, even more than
animals, must be well adapted to climate in order to survive. They cannot move
about or take shelter but must be equipped to endure whatever weather conditions
are likely to occur. In the harsh conditions of the tundra, for example, low
growing mosses, lichens, and a few flowering plants all hug the ground for
shelter from icy winds. Animals, despite their ability to move about and find shelter, are just as much influenced by climate as plants are. Creatures such as the camel and the penguin are so highly specialized that they have an extremely limited distribution. Others, such as bears are flexible enough to adapt to a broad range of climates. Oc A. to avoid being eaten by arctic animals B. because fertilizer is not readily available C. to minimize exposure to the cold D. because unfrozen water supplies are very scarce [单选题]试验装置的电源开关,应使用(),并在刀刃或刀座上加绝缘罩,以防误合。
A.单极刀闸 B.双极刀闸 C.有过载保护的开关 D.电动开关 [判断题]《铁路旅客运输服务质量规范》(铁总运〔2016〕247号)规定:车内清扫工具放置在清洁柜内,无清洁柜的存放座席下。
A.正确 B.错误 [判断题]停电操作必须按照断路器、负荷侧隔离开关、电源侧隔离开关顺序操作。送电操作顺序与此相同。
A.正确 B.错误 [判断题]阀控式密封铅酸电池组实存容量低于70%标称容量时需要整组更换。
A.正确 B.错误 [多选题]电流对人体的伤害主要有三种分别是( )、( )和( )。
A.电伤 B.电击 C.电晕 D.电磁场伤害 [多项选择]逍遥散主治证的病机是( )
A. 肝郁 B. 血瘀 C. 血虚 D. 血热 E. 脾虚 [判断题]( )制动梁端轴磨耗运用限度规定不超过4mm。
A.正确 B.错误 [单选题]在低压架空绝缘电线的绝缘层操作时,应用耐气候型号的自粘性橡胶带至少缠绕( )作绝缘补强。
A.2层 B.3层 C.5层 D.6层 [判断题]燃气可以人工方法制取,也可以从天然资源中获得。 ( )
A.正确 B.错误 [判断题] 扑救影剧院火灾,往往受到现场条件、救助对象和内攻环境等因素的影响,增加了灭火战斗行动的艰巨性和困难性。( )
A.正确 B.错误 [单选题]在我国,原发性高血压最常见的死亡原因是
A.心律失常 B.尿毒症 C.脑血管意外 D.心力衰竭 E.高血压危象 [单项选择]Why doesn’’t David Harrison include Arabic as one of the top three languages ?()
A. The number of Spanish speakers is far greater than that of Arabic speakers. B. Arabic spoken in one Arab country may not be understood in another. C. Arabic spoken in Egypt differs from Arabic spoken in Morocco in origin. D. The number of Arabic speakers is declining because of the invasion of English. [判断题]1司机在正常作业中应只服从一个佩带有标志的指挥人员发出的指挥信号。( )
A.正确 B.错误 [单选题]为保障人身安全,在正常情况下,电气设备的安全电压规定为( )。
A.50 V B.48 V C.36 V D.24 V [单选题]用于补偿线路分布电容电流,并减少电网由于使用了检漏继电器而引起的对地绝缘水平下降的元件是:( )
A.三相电抗器 B.零序电抗器LK C.硅整流器ZL D.晶闸管 [填空题]以下程序运行后的输出结果是______。
#include<stdio.h> main( ) int a=1, b=2, e=3, d=0; if(a==1) if(b!=2) if(c==3) d=1; else d=2; else if(c!=3) d=3; else d=4; else d=5; printf("%d/n", d); [判断题]冰雪道路行车,由于积雪对光线的反射,极易造成驾驶人目眩而产生错觉。
A.正确 B.错误 [简答题]监察委员会依照本法和有关法律规定履行哪些职责?
[简答题]白喉杆菌的致病因素是什么?如何进行防治?
[单选题].( )适合晚上 6 点以后参加正式宴会。
A.正式晚宴妆 B.特殊晚宴妆 C.舞台晚宴妆 D.⽇妆 [填空题]铁路机车乘务制中,我国铁路内燃、电力机车多采用()。
[单项选择]60岁女性患者,10年前被诊断糖尿病,未坚持治疗。近2个月出现肢端麻木,有时有尿意但排尿困难,超声显示尿潴留。最可能的诊断是
A. 糖尿病性动脉硬化 B. 骨质增生压迫神经 C. 糖尿病合并脑梗死 D. 糖尿病神经病变 E. 糖尿病合并前列腺肥大 [单选题]建筑施工企业应当实行建设工程项目( )人员委派制度。建设工程项目的专职安全生产管理人员应当定期将项目安全生产管理情况报告企业安全生产管理机构。
A. 专职安全生产管理 B. 专职生产管理 C. 专职安全管理 D. 生产负责人 [判断题]构成重大责任事故罪的主观要件是故意而不是过失。 ( )
A.正确 B.错误 我来回答: 提交
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