The two correct phrases to complete the sentence are 'Is high' and 'is great'. This highlights how angular momentum relates to the ability of a gyro to resist external torques. Therefore, the complete sentence suggests that greater angular momentum allows for better resistance to changes in motion.
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The best way to complete the sentence "Angular momentum, resisting force of the gyro to external torque" with two phrases from the options given is by selecting option (E) "The higher the, the greater the."
Thus, the completed sentence would be: "The higher the angular momentum, the greater the resisting force of the gyro to external torque." ;