下载APP
【判断题】
电梯按钮等光滑表面上病毒存活时间长。( )
A.
正确
B.
错误
举报
题目标签:
光滑表面
活时间
电梯按钮
参考答案:
参考解析:
刷刷题刷刷变学霸
举一反三
【判断题】利用sLA技术制造的产品表面光洁虽然在侧面和曲面上在所建造的各层之间有阶梯,但在零件顶层的表面可得到玻璃状的光滑表面。
A.
正确
B.
错误
查看完整题目与答案
【单选题】木制案板具有光滑、表面平整和()等特点。
A.
散热性强
B.
抗腐蚀性强
C.
质地软
D.
传热性能强
查看完整题目与答案
【简答题】(2012年2月深圳第一次调研)如图(a)所示,“┙”型木块放在光滑水平地面上,木块水平表面AB粗糙,光滑表面BC且与水平面夹角为 θ=37°.木块右侧与竖直墙壁之间连接着一个力传感器,当力传感器受压时,其示数为正值;当力传感器被拉时,其示数为负值.一个可视为质点的滑块从C点由静止开始下滑,运动过程中,传感器记录到的力和时间的关系如图(b)所示.已知sin37°=0.6,cos37°=0.8,g取...
查看完整题目与答案
【单选题】当车站发生火灾时,若乘客电梯未正常归首,维保人员应立即按下乘客电梯()按钮,使乘客电梯强制归首。
A.
消防归首
B.
外呼
C.
内呼
D.
控制柜
查看完整题目与答案
【单选题】In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces...
A.
Visionics produced the best face-recognition software enhancing airport security
B.
Visionics’s stocks rose in price
C.
the airports were satisfied with the software
D.
Visionics’s software was a great success
查看完整题目与答案
【单选题】In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces...
A.
any way, the face-recognition technology is good enough to frighten the terrorists
B.
the industry will have to recognize the real situation and work hard to improve the technology
C.
all the claims are premature
D.
we must not expect too much
查看完整题目与答案
【简答题】Read and understand "Facts about Novel Coronavirus". Translate the following expressions from Chinese into English. 1. 新冠病毒 2. 传播途径 3. 免疫力低 4. 消毒物品 5. 湿度40% 6. 有慢性基础疾病者 7. 易感病毒 8. 潜伏期 9. 流行病学调...
查看完整题目与答案
【单选题】Passage 4 In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civ...
A.
Too many false alarms were raised.
B.
Everyone should look straight at the camera.
C.
Only 90% of suspects at an airport were found.
D.
Everyone should not disguise himself.
查看完整题目与答案
【判断题】光滑表面,湿式显像比干式好。
A.
正确
B.
错误
查看完整题目与答案
【简答题】患者由家属搀扶外出,行至电梯处,适逢电梯门关闭,其家属松开病人迅速上前抢按电梯按钮,遂听到噗通倒地声,回头发现病人跌倒。后医师及护士赶到现场查体发现左侧眉骨处肿胀淤青,立即推回病房,局部予以冰块冰敷。说法正确的是()A非跌倒事件B1级跌倒事件C2级跌倒事件D3级跌倒事件
查看完整题目与答案