• 2021-04-14
    The smallest coin is the ___ penny.
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      7. Penny Black:黑色硬币

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      Which is ______, the sun, the moon or the earth?---Of course, the moon is ______ . A: small B: smaller C: smallest D: the smallest

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      The slenderness ratio is [img=30x25]1803a0f79d25495.png[/img], where [img=9x14]1803a0f7a75d311.png[/img] is the ( ) radius of gyration of the cross section. Buckling will occur about the axis where this ratio gives the ( ) value. A: smallest, greatest B: smallest, smallest C: largest, greatest D: smallest, any

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      中国大学MOOC: 7. Penny Black

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      Who first created the proverb “A penny saved is a penny earned.”?( ) A: John Kennedy B: George Washington C: Benjamin Franklin D: Franklin D. Roosevelt