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Cliff Young, an Unlikely Hero The annual Australian marathon is one of the toughest races in the world, a harsh test of __________ for the world’s top athletes. Cliff Young, a __________ 61-year-old famer with rubber boots, was to take part in the race. People first assumed Cliff was there to __________ the race. When they learned of his intention, the athletes around him reacted with __________ and __________ . The press were __________ , focused the cameras on Cliff and shouted questions at him. The marathon started and Cliff was __________ with the strangest running style. Everyone was __________ the next morning when the news showed Cliff was still in the race. Cliff , though behind others, kept running just like gathering his sheep and trying to __________ . By the fifth night, he had overtaken all the other runners and __________ the record by finishing the 875-kilometer race in 5 days, 15 hours and 4 minutes — 9 hours faster than anyone before! Cliff Young became __________ . He distributed his first prize to 5 other runners. Cliff came to __________ again in 1997, at age 75, when he ran around Australia to raise money for homeless children. He kept running for the rest of his life and never __________ . It was not until the year 2000 when he had __________ that he stopped running. To this day, Cliff Young remains a __________ reminder and brilliant example of how ordinary __________ can inherently achieve remarkable results.
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【单选题】我司被保险机动车负次要事故责任的,事故责任比例为
A.
70%
B.
50%
C.
30%
D.
100%
【简答题】接触器铭牌上的额定电压是指主触点的额定工作电压,应 负载的额定电压
【简答题】阅读材料,回答问题: 煤气中的主要成分是一氧化碳,通常情况下,它是一种无色、无味的气体。为了防止煤气中毒,常在煤气里加一些有强烈刺激性气味的气体——硫醚。当煤气泄漏时,人们可以从硫醚的气味察觉到煤气泄漏了,以便即使采取措施。一氧化碳密度略小于空气。一氧化碳燃烧会产生二氧化碳。一氧化碳还可以跟铁矿石中的三氧化二铁在高温下发生反应,生成铁和二氧化碳。 (1)一氧化碳的物理性质有_______     ...
【单选题】已知一标准渐开线圆柱斜齿轮与斜齿条传动,法面模数mn=8mm,压力角αn =20°,斜齿轮齿数Z1=20,分度圆上的螺旋角β=15°,此齿轮的节圆直径等于 mm。
A.
169.27
B.
170.27
C.
171.27
D.
165.64
【单选题】对于受压构件箍筋的描述,不正确的是
A.
为了能与纵筋形成钢筋骨架,防止纵筋压曲,受压构件中的周边箍筋应做成封闭式
B.
对于轴心受压柱,从箍筋加工角度考虑,可采用内折角的箍筋
C.
设置柱内箍筋时,宜使纵筋每隔1根位于箍筋的转折点处
D.
箍筋直径不应小于d/4(d为纵筋最大直径),且不应小于6mm
【判断题】在受压构件中截面箍筋应做成封闭式,不可采用有內折角的形式。
A.
正确
B.
错误
【判断题】受压构件中截面周边箍筋应做成封闭式,但不可采用内折角的形式。
A.
正确
B.
错误
【简答题】习题图所示为一个防盗报警电路,a、b两端被一细铜丝接通,此铜丝置于小偷必经之处。当小偷闯入室内将铜丝碰断后,扬声器即发出报警声(扬声器电压为1.2V,通过电流为40mA)。 (1)试问555定时器接成何种电路? (2)简要说明该报警电路的工作原理。 (3)如何改变报警声的音调?
【判断题】受压构件中的箍筋应采用封闭形式。( )
A.
正确
B.
错误
【单选题】2 如题 1.2 图所示电路,两个电源一共发出的功率为( )。
A.
200W
B.
400W
C.
250W
D.
100W
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