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【单选题】
那种探测器的工作原理是利用多普勒效应,可穿透非金属物质,不易被人察觉,受天气环境变化影响小?
A.
微波探测器
B.
光束遮断式探测器
C.
热感式红外探测器
D.
视频移动探测器
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举一反三
【单选题】In the power plant more than_______of the workers are out ________strike.
A.
two-twelfths; on
B.
two twelfth; in
C.
two twelfths; in
D.
two-twelfths; in
【单选题】建设社会主义生态文明,必须把 ( ) 放在首位
A.
人与人的和谐相处
B.
环境保护
C.
生态保护
D.
节约资源
【单选题】When the current in a power transmission line is increased, the power loss _____.
A.
increases as the square of the current
B.
decreases as the square root of the current
C.
remains the same, as it is independent of current flow
D.
increases in direct proportion as the current
【单选题】建设社会主义生态文明,必须把( )放在首位
A.
加大环保力度
B.
做好生态保育工作
C.
节约资源
D.
建设循环经济
【判断题】肩周炎粘连日久,肌肉出现萎缩,尤以三角肌、冈上肌萎缩明显。()
A.
正确
B.
错误
【判断题】用刀刃形状与被切齿齿廓形状完全相同的圆盘铣刀或指状铣刀在普通铣床上加工的是仿形法。
A.
正确
B.
错误
【单选题】有关脊髓灰质炎后遗症,下列哪项描述是不正确的()
A.
脊髓受累部位是脊髓前角运动神经元
B.
经一年治疗无效,即进入后遗症期
C.
临床查体时膝反射及跟腱反射亢进
D.
瘫痪肢体的运动代偿活动而产生肢体畸形
E.
后遗症期可借助手术改善肢体功能
【单选题】The two strokes of a two-stroke/cycle diesel engine are _________.
A.
power and intake
B.
intake and exhaust
C.
exhaust and compression
D.
compression and power
【单选题】If two scientists at Los Alamos National Laboratory are correct, People will still be driving gasoline-powered cars 50 years from now, giving out heat-trapping carbon dioxide into the atmosphere--and ...
A.
It is given a patriotic name.
B.
No law of physics is violated.
C.
It is based on existing technology.
D.
Carbon dioxide can be converted into fuel.
【判断题】肩周炎粘连日久,肌肉出现萎缩,尤以三角肌、冈上肌萎缩明显。()
A.
正确
B.
错误
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