Abnormal condition of being hard is referred to as ______.

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• Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

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• The maneuvering information required to be posted in the wheelhouse must be based on certain conditions.Which of the following is NOT one of these conditions?（）

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• For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes?（）

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• A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.

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• The above mentioned condition was caused （　）the process of manufacturing.

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• He（）himself quickly to the new condition of his work.

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• _____ is an abnormal narrowing of the larynx (voice box).

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• The dot-com collapse may have been a disaster for Wall Street, but here in Silicon Valley, it was a blessing. It was the welcome end to an abnormal condition that very nearly destroyed the area in an overabundance of success. You see, the secret to the Valley's astounding multiple decade boom is failure. Failure is what fuels and renews this place. Failure is the foundation for innovation.

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• Which of the following sentence has the meaning with &8220;Take off aborted due starboard engine EGT abnormal.&8221;（）

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