[多项选择]When a database administrator chooses the dimensions for an MDC table, which two characteristics should beconsidered?()
A. the query transaction rate
B. numeric data versus character data
C. extent size
D. the cardinality of the candidate columns
E. prefetch size
[填空题]
An airplane flies because its wings push down on the air
flowing past them, and in reaction, the air pushes up on the wings. When an
airplane is level or rising, the front edges of its wings ride higher than the
rear edges. The angle the wings make with the horizontal is called the angle of
attack. As the wings move through the air, this angle causes them to push air
flowing under them downward. A sleeper angle of attack will cause the wings to
push more air downward. The third law of motion voiced by English physicist
Isaac Newton states that every action produces an equal and opposite reaction.
In this case, the wings pushing air downward is the action, and the air pushing
the wings upward is the reaction. This causes lift, the upward force on the
plane, Lift is often explained using Bernoulli’s principle, which states that,
in some circumstances, a faster moving fluid(流体) (such as air)will have a lower
pressure than a slower moving fluid. The ai
[单选题]丰收贷记卡账户临时额度调整最大调整比例为账户永久额度的()
A.0.3
B.0.5
C.1
D.2
[单选题]过球试验时,将单车试验器置1位充风,实心尼龙球须通过( )进入网状回收器。
A.截断塞门
B.制动主管
C.制动支管
D.连通管
[判断题]指令驱动系统是一种竞价市场,也称为“做市商市场”。( )
[单选题]下面属于国家鼓励工业使用节能技术的是( )。
A. 热回收水系统
B. 热电联产
C. 变频器
D. 脱硫除尘设备
[单选题]3月28日,中国科技部日前批复同意支持()建设国家生猪技术创新中心,这是中国农业领域首个国家级技术创新中心
A.成都市
B.重庆市
C.西安市
D.济南市
[判断题]所有可能泄漏煤气的地方均应挂有提醒人们注意的警示标志。
A.正确
B.错误
[简答题] Since the majority of Indian reservations are in the arid West, it is understandable that water has been a central environmental issue. By 1900, whites actively competed with Indians for this (47)______ resource. At one Indian Reservation in Montana, white settlers diverted (使转向) water from the Milk River. When ordered to stop, they argued that the Indians had not made prior appropriation use. In 1908 the Supreme Court ruled in Winters v. United States that in establishing reservations, Congress implied and reserved the priority water rights necessary for (48)______ and future use. Encouraged by the Winters decision, the Indian Bureau used Indian funds to construct elaborate irrigation (灌溉) systems to protect Indian water and improve the (49)______ potential of the allotted land. Irrigation promised to change the landscape and increase Indian self-sufficiency, but the systems suffered from poor construction, improper use and (50)______, and often ended up in the hands of white (51)
[单选题] BC003安全阀的检验周期为( )。
A. 半年
B. 1年
C. 2年
D. 2.5年
[单选题]安规细则规定:凡引发( )变化的施工结束后,施工现场协调小组负责人必须指派运用干部继续盯控现场,确认无任何安全隐患后,方可离开。
A.作业方式
B.设施设备
C.站场线路
[判断题]由于设置了关门防夹保护,不必再要求阻止关门的力不大于 150N。( )
A.正确
B.错误
[判断题]3.17.第17题
电缆线路的敷设施工,应按已批准的设计书施工图进行施工。
A.正确
B.错误
[多选题]甲状腺大部分切除术后的并发症有:( )
A.呼吸困难和窒息
B.喉返神经损伤
C.喉上神经损伤
D.手足抽搐
E.甲状腺危象
[单选题] 下列国家中,各高校设立“海森堡”奖学金制度,旨在提升教授职位的影响力的国家是( )。
A. 美国
B. 德国
C. 日本
D. 加拿大
[单选题] 初产妇王某,妊娠39周住院待产。检查:规律宫缩,枕左前位,胎心146次/min,宫口开大3cm。在产程护理措施中,错误的是(0分)
A.鼓励2~4h排尿1次
B.指导合理进食
C.休息时取左侧卧位
D.每隔1~2h听1次胎心
E.宫缩时属正确用腹压
[单选题]在康明斯发电车冷却风机控制电路中,继电器KA8的线圈电压是( )。
A.24V
B.48V
C.220V
D.380V 623
[单项选择]“国际消费者权益日”定在每年的()
A. 2月15日
B. 3月15日
C. 4月15日
D. 5月15日
[判断题]在充满可燃气体的环境中,可以使用手动电动工具。
A.正确
B.错误
[简答题]
某回归模型,经过计算得回归平方和,残差平方和,求该回归方程的总离差和R2的值。
[单选题]被调介质流过阀门的相对流量(Q/Qmax)与阀门相对行程(l/L)之间关系称为调 节阀的()。
A.直线特性
B.流量特性
C.位移特性
D.抛物线特性
[单项选择]“人民公仆,干部楷模—党的好干部焦裕禄展”在()举行
A. 辽沈战役纪念馆
B. 平津战役纪念馆
C. 黑龙江博物馆
[单项选择]中国考据在什么时候达到了鼎盛()
A. 明
B. 清
C. 民国
D. 现代
[单项选择]员工申诉系统的功能是()。
A. 复审复查考评结果
B. 确保考评有效
C. 给考评者一定压力
D. 确保考评准确
[单选题]
粪便隐血试验阳性者提示出血量多少
A.每日出血量5ml以上
B.每日出血量20ml以上
C.每日出血量10ml以上
D.每日出血量60ml以上
E.每日出血量30ml以上
[单项选择]狗脊表面为()
A. 被粗刺
B. 被光亮的金黄色茸毛
C. 被棱线
D. 被硬毛
E. 密被排列整齐的叶柄残基及鳞片
[单选题]经常遇到的岩石破坏形式是(
A.拉断
B.剪断
C.压破坏
D.膨胀破坏