单项选择题 Enhanced procedures concerning the exercise of （） have been developed to allow intervention in the ease of deficiencies deemed to pose a danger to persons, property or the environment.

单项选择题 It is often necessary to put an engine into （） service with one or more cylinders cut out, or with a turbocharger secured.

单项选择题 The cylinder oil will have to neutralize the acidic products of combustion and have good （） properties to keep the metal surfaces clean.