A new kind of radar has been developed
for spaceship travelers. A working laboratory model of a new system of radar
that makes use of a beam of light is said to be ten thousand times more accurate
than the best comparable system of radar that uses microwaves. The model has shown that this radar system, known as laser-dopple radar, can measure with absolute precision speeds varying from spaceship orbital injection(进入)velocities(速度)of five miles per second down to virtual stops-speeds of less than one-thousandth of an inch per second. According to the scientists who are developing this system, such fine measures of velocity are of prime importance in space missions. In a rendezvous(对接) between two spaceships, or in a landing approach by a vehicle onto an orbiting space station, a bump could rip open a ship’s skin, or a nudge could k A. measures the movement of a spaceship by means of light beam B. makes use of microwaves C. makes use of sound waves D. both A and B [单项选择]
患者,女性,23岁。右足癣并感染1周。2天前开始出现右小腿有片状红疹。体检见右小腿片状红疹,颜色鲜红,中间较淡,边缘清楚。右腹股沟淋巴结肿大。 该病致病菌是()A. 金黄色葡萄球菌 B. 溶血性链球菌 C. 埃希杆菌 D. 变形杆菌 E. 绿脓杆菌 [多选题] 变压器高频局部放电带电测试,可以从()部位获得局部放电信号。
A. 铁芯接地引下线 B. 夹件接地引下线 C. 末屏接地引下线 D. 放油阀处 [判断题]需要变更工作班成员时,须经工作票签发人同意,在对新工作人员进行安全交底后,方可进行工作。
A.正确 B.错误 [单选题]测深钢卷尺对尺带宽度、尺带厚度、刻线长度、各长度范围内的( )均有严格规定。
A.测量标准 B.尺寸限度 C.精度等级 D.允许误差 [判断题]契税的计税依据是房屋产权转移时,双方当事人约定的转让价格,任何单位和个人不得改变计税价格。( )
A.正确 B.错误 [单项选择]维勃稠度法适用于维勃稠度在()之间的砼拌合物稠度的测定。
A. 10~20秒 B. 5~30秒 C. 20~50秒 D. 5~50秒 [判断题]不履行职责、不服从命令、不遵守纪律等,经批评教育、纪律处分后仍不改正的消防员可以予以辞退。
A.正确 B.错误 [判断题]内部审计人员应当具备内审人员从业资格,拥有与工作职责相 匹配的道德操守和专业胜任能力。( )
A.正确 B.错误 [单项选择]填入下面横线处的几句话,排列恰当的一项是( )。
当今时代,科技进步对一个国家经济社会的发展越来越具有决定性的作用,我们必须______。 ①着力促进科技成果切实转化为现实生产力 ②尽快形成自己的科技创新体系 ③坚定不移地实施科教兴国战略 ④真正把加速科技进步放在经济发展的关键地位 A. ④③①② B. ③④②① C. ①②③④ D. ②①④③ [单项选择] Newspaper publishers in the United States have long been enthusiastic users and
distributors of weather maps. Although some newspapers that had carried the United States
Weather Bureau’s national weather map in 1912 dropped it once the novelty had passed,
many continued to print the daily weather chart provided by
(5) their local forecasting office. In the 1930’s, when interest in aviation and progress in
air-mass analysis made weather patterns more newsworthy, additional newspapers
started or resumed the daily weather map. In 1935, The Associated Press (AP) news
service inaugurated its WirePhoto network and offered subscribing newspapers
morning and afternoon weather maps redrafted by the AP’s Washington, B.C, office
(10)from charts provided by the government agency. Another news service, United Press
International (UPI), developed a competing photowire network and also provided
timely weather maps for both morning and afternoon newspapers
A. began again B. held back C. thought over D. referred to [填空题] 由两个或两个以上不同半径组成的曲线称( )。
[填空题]动火工作票各级审批人员和签发人、( )、许可人、消防监护人、动火执行人应具备相应( ),在整个作业流程中应履行各自的( )。
我来回答: 提交
|