队列研究的特点为-我要搜题网

[单选题]20. ZD6-E型电动转辙机的电动机小齿轮为( )齿。
A.14
B.16
C.12
D.20

[判断题]铁路桥梁的护轮轨上应安装钢轨绝缘。(　　)[311000000]
A.正确
B.错误

[填空题]《技规》规定：听觉信号：<--NRC-->、口笛、响墩发出的音响和机车、自轮运转特种设备的鸣笛声。

[单项选择]以建设成阿、成甘等飞地工业园和省内对口帮扶为载体，加强与民族地区在（）、绿色产品深加工等领域合作。
A. 现代化畜牧业
B. 清洁能源利用
C. 特色旅游业
D. 中医药产业

[不定项选择题]共用题干 Robotic Highway Cones
A University of Nebraska professor has developed robotic cones and barrels.These robotic cones and barrels can move out of the way,or into______(51),from computer commands made miles away. They can even be programmed to move on their own at any particular part of the day,said Shane Farritor,an assistant professor of mechanical engineering at Nebraska.
For example,if workers arrived at 6 am,the cones could move from the side of the highway to______(52)off the lane at that time.And they can return to the______(53)place at the end of the day."It just seems like a very good application for robots."Farritor said."The robot-ic cones would also help______(54)people from hazardous jobs on the highway putting barrels and cones into place,"Farritor said in a report on his creation.
Work on the idea began in 2002 using a National Academy of Sciences grant. The______ (55)allowed Farritor to work on the project with graduate students at Nebraska and his assistant Steve Goddard.
The robots are placed at the bottom of the cones and barrels and are______(56)enough not to greatly change the appearance of the construction aides."It would look exactly the same," Farritor said."______(57)there's a kind of rubbery,black base to them. We replace that ______(58)a robot."
Farritor has talked with officials from the Nebraska Department of Roads about how the robots would be most______(59)to what they might need.
The robots could come in handy following a slow-moving maintenance operation,like paint-ing a stripe on a road or moving asphalt,______(60)now the barrels have to be picked up and moved as the operation______(61)."That way you don't have to block off a 10-mile strip for the operation,"Farritor said.
______(62)prototypes have been made,they are not in use anywhere. Farritor said he has______(63)for a patent and is considering what to do next. He is thinking about starting a small business. He is also thinking about______(64)the robots to roads departments and others across the country who may______(65)from them. 63._________
A.applied
B.asked
C.called
D.argued

FIVE-DAY WEATHER
TODAY	TOMORROW	SUNDAY	MONDAY	TUESDAY
High 29 Low 21 Variably cloudy Sunrise: 6:35 a. m. Sunset: 8:04 p. m.	High 28 Low 20 Mainly cloudy with isolated showers ending in the afternoon Sunrise: 6:36 a. rn. Sunset: 8:02 p. m.	High 27 Low 19 Sunny with cloudy periods developing in the afternoon Sunrise: 6:38a. m. Sunset: 8:00 p.m.	High 26 Low 17 Thundershowers (POP 8O%) Sunrise: 6:40 a. m. Sunset : 7:57p. m.	High 24 Low 16 Windy with thundershowers and possibly storm in the north Sunrise: 6:42 a. m. Sunset: 7:55p. m.

[单项选择]队列研究的特点为A. 属描述性研究B. 所需时间短C. 不设对照D. 采用前瞻性的方法E. 是"从果到因"的研究

热门试题:

[单项选择]队列研究的特点为
A. 属描述性研究
B. 所需时间短
C. 不设对照
D. 采用前瞻性的方法
E. 是"从果到因"的研究