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【T10】 A.WARN B.AWAY C.OUT A.MEN AND ANIMALS MIGHT SOON DIE【T7】______ B.THEIR HANDS WERE BURNT【T8】______ C.FEAR WOULD NOT【T9】______IT TO KEEP AWAY FROM THE FIRE FEAR AND ITS COMPANION PAIN ARE TWO OF THE MOST USEFUL THINGS THAT MEN AND ANIMALS POSSESS, IF THEY ARE PROPERLY USED.
IF FIRE DID NOT HURT WHEN IT BURNT, CHILDREN WOULD PLAY ITUNTIL【T10】______.SIMILARLY, IF PAIN EXISTED BUT FEAR DID NOT, A CHILD WOULD BURN ITSELFAGAIN AND AGAIN, BECAUSE【T11】______THAT HAD BURNT IT BEFOR
E.
A REALLY FEARLESS SOLDIER—AND SOME DO EXIST—IS NOT A GOOD SOLDIER BECAUSE HE IS SOON KILLED; AND A DEAD SOLDIER IS OF NO USE TO HIS ARMY.FEAR AND PAIN ARE THEREFORE TWO GUARDS WITHOUT WHICH【T12】______.
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【简答题】五连杆机构如图所示。已知：O 1 A=AC=R， ， 。在图示位置时，φ=60°，O 1 A与O 2 B均铅垂，CB水平。O 1 A杆的角速度为ω 1 ，O 2 B杆的角速度为零。试求该瞬时铰链C点的速度。