热门试题:
[单选题]光纤的主要材料是()。
A.石英
B.聚氯乙烯
C.玻璃纤维
D.塑料
[判断题]以电或光信号作为传递和交换信息手段的通信方式所构成的通信系统称为电信系统。()
A.正确
B.错误
[不定项选择题]共用题干
Seeing the World Centuries Ago
If you enjoy looking through travel books by such familiar authors as Arthur Frommer or Eugene Fodor,it will not surprise you to learn that travel writing has a long and venerable history.Almost from the earliest annals of recorded time individuals have found ready audi-ences for their accounts of journeys to strange and exotic locales.
One of the earliest travel writers,a Greek geographer and historian named Strabo,lived around the time of Christ.Though Strabo is known to have traveled from east of the Black Sea west to Italy and as far south as Ethiopia,he also used details gleaned from other writers to extend and enliven his accounts.His multivolumed work Geography provides the only sur-viving account of the cities,peoples,customs,and geographical peculiarities of the whole known world of his time.
Two other classic travel writers,the Italian Marco Polo and the Moroccan Ibn Battutah, lived in roughly the same time period.Marco Polo traveled to China with his father and uncle in about
A.
D.1275 and remained there 16 or 17 years,visiting several other countries during his travels.When Marco returned to Italy he dictated his memoirs,including stories he had heard from others,to a scribe,with the resulting book Ⅱ milione being an instant success.Though difficult to attest to the accuracy of all he says,Marco's book impelled Europeans to begin their great voyages of exploration.
Ibn Battutah's interest in travel began on his required Muslim journey to Mecca in 1325, and during his lifetime he journeyed through all the countries where Islam held sway.His travel book the Rihlah is a personalized account of desert journeys,court intrigues,and even the effect of the Back Death in the various lands he visited.In almost 30 years of traveling it is estimated that Ibn Battutah covered more than 75,000 miles.
Ibn Battutah traveled______.
A.to China
B.to Ethiopia
C.throughout the Muslim world
D.for 16 or 17 years
[单项选择]
The demoralizing environment, decrepit (老朽的) building and minimal materials make the high school experience for these children an uphill battle. Merely graduating from such a high school is difficult, much less becoming a high-caliber science or engineering student. Schools with students from a higher socioeconomic level would not tolerate the obstacles I encountered dally. Improvements need to be made efficiently and made soon, or the divisions among people in this country will only become more extreme.
Of course, there are things that concerned citizens can do to help. Get involved with a school, especially one in a poor area. Volunteer to give a presentation or just to spend time with the children. My students were excited to talk to an insurance salesperson who came to give a career exploration lecture. They not only were genuinely interested in the opportunities he described but also were amazed that such a man would donate an afternoon to them.
Although thos
A. a tough task.
B. a easy job.
C. an upgrade class.
D. climbing a hill.
[单选题]（2015）火灾爆炸的预防包括防火和防爆两方面。下列措施中，不符合防爆基本原则的是（ ）。
A.防止爆炸性混合物的形成
B.负压操作
C.严格控制火源
D.检测报警
[判断题]隔开设备须处于隔开位置，使用后立即恢复隔开位置。
A.正确
B.错误
[单项选择]无分电器点火系由转速传感器、负荷传感器、电子控制单元、高压线、（）、火花塞组成。
A. 发动机
B. 断电器
C. 点火线圈
[多项选择]与纸质出版物相比，电子出版物具有（）等特点。
A. 不易长久保存
B. 体积小
C. 版本更新灵活、方便、快速
D. 检索便捷
E. 阅读方式不受限制
[多项选择]缺血缺氧期导致微血管发生强烈痉挛的有：（）
A. 儿茶酚胺
B. 血栓素
C. 血小板活化因子
D. 缓激肽
E. 白三烯
[多选题]根据《建设工程安全生产管理条例》规定,施工单位发生生产安全事故后( )。
A.应立即停工
B.应当采取措施防止事故扩大
C.需要移动现场物品时,应当做出标记和书面记录,妥善保管有关证物
D.应保护事故现场
E.不许采取任何措施
[判断题]客统7是旅客伤亡及行李、包裹事故报告。 （ ）
A.正确
B.错误
[单选题] 国际结算业务中受汇款人委托将资金汇出的银行叫__( )
A.、托收行
B.、提出行
C.、汇出行
D.、解付行
[判断题]鲁姆斯裂解乙烯装置急冷系统采用先水冷后油冷( )
A.正确
B.错误
[单选题]某220kV主变原计划5月上旬进行定检、合并单元插件更换等工作，因自身准备不足，申请调整至5月下旬完成，于5月30完成检修并恢复送电，则应视为（）。
A.计划检修
B.非计划检修
C./
D./
E./
F./
G./
H./
[单项选择]结晶型二氧化硅主要见于（）。
A. 玛瑙石
B. 花岗石
C. 大理石
D. 石英玻璃
E. 硅藻土
[判断题]为债务人抵押担保的第三人，在抵押权人实现抵押权后，无权向债务人追偿。
A.正确
B.错误
[单项选择]患儿，7岁，左下第一磨牙近中邻面深龋，探诊敏感，冷测（+），无迟缓性痛。X线片示：患牙根尖未发育完全，根尖无明显暗影。腐质去净后探及针尖大小穿髓孔，此时最恰当的治疗方法是（）
A. 根管治疗
B. 牙髓切断术
C. 直接盖髓术
D. 间接盖髓术
E. 牙髓摘除术
[单选题]单位结算存折账户的预留印鉴变更时，应按照规定向开户银行提供相应的资料，填写“_________”，并分别加盖新旧印鉴。
A.结算业务申请书
B.更换印鉴申请书
C.变更申请书
D.销户申请书
[单项选择]不属于眼眶构成骨的是（）
A. 泪骨
B. 腭骨
C. 上颌骨
D. 额骨
E. 颞骨
[单选题]营业线施工作业（特别规定的慢行施工除外）和应纳入天窗的（ ）应在天窗内进行。
A.检查作业
B.维修作业
C.保养作业
D.综合维修
[多项选择]加工中出现钢筋长度和弯曲角度不符合图纸要求的现象，其原因有（）。
A. 下料不准确
B. 角度控制没有采取保证措施
C. 用手工弯曲时，扳距选择不当
D. 钢筋进场后未进行复试
[单选题]甲苯储罐的单个罐容为（）m³。
A.500
B.1000
C.2000
[单项选择]患者王某，患高血压病2年，经过1个月的住院治疗后，病情好转准备出院。出院前责任护士与其共同探讨出院后的饮食，此时护士扮演的角色（）
A. 计划者
B. 教育者
C. 护理者
D. 协调者
E. 管理者
[填空题]协同运输是（）消耗ATP的主动运输方式，根据物质运输方向与离子沿梯度的转移方向，可分为（）和（）两种方式。
[判断题]沸水烫粉拌制法，一般适用于干磨粉、水磨粉，调制生粉团。
[单选题]交班工作人员按照解锁取签程序解锁取签时，填写“上锁挂签工作表”时，选择（ ）
A.上班
B.下班
C.接班
D.换班
[判断题]配电盘操作前,应检查无积尘,各连接紧固点无松动、氧化、虚接等现象。
A.正确
B.错误
[单选题]电流强度越大，致命危险越大；持续时间越长，死亡的可能性越大。能引起人感觉到的最小电流值交流为1mA，直流为5mA；对于这种最小电流我们称为（ ）。
A.互感电流
B.静电
C.感应电流
D.感知电流
[单选题](44926)靠近线路堆放道砟、片石、砂子等线桥用料,料堆的坡度不得陡于()。
A.1:1
B.1:1.25
C.1:1.5
D.1:1.75
[简答题]用户变、配电站的工作许可人应是持有效证书的高压电气工作人员。
[单选题]先进的社会意识之所以能对社会的发展起促进作用,是由于( )。
A.它正确地反映了社会发展规律
B.它是社会存在的反映
C.它具有相对独立性
D.它具有历史继承性
[单选题]徒手救人不适用于紧急救助。( )(中)
A.正确
B.错误
[单选题]当耐张长度在800m及以下时,一个耐张段内架空地线补强线段的总数量安全值为( )
A.0个
B.1个
C.2个
D.4个
