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This post was last edited by 3983596_FPPZ on 2019-4-8 09:24. For the multiple-choice questions in bk12.jpg, the rules are as follows: 1. If both answers are incorrect, +2 wealth points for active participation; if one answer is correct and the other is incorrect, +5 wealth points; if both answers are correct, +8 wealth points. 2. If only one answer is provided, unless it is clear which question’s answer it is, a correct answer earns +5 wealth points, while an incorrect answer earns +2 wealth points; in all other cases, it is counted as active participation and grants +2 wealth points. 3. Rewards for answers are available once per person only. 4. Each reply allows scoring for only one person. 5. The answer and its explanation will be visible after responding. 6. The reward is valid for 48 hours; no reward will be given after that period. Again, an award for learning! Come by here every day. 1. When there are through-going scratches on the flange sealing surface and the depth of these scratches is less than 0.5 mm, a gasket with high elasticity and greater thickness can be used; in principle, no further action is required and the component can continue to be used. ( ) 2. The separation efficiency of a suspension separator (also known as a hydrocyclone) is influenced far more by the volume of the particles than by their specific gravity. ( ) Answer: 1. Incorrect ； 2. Error