问题
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When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be _____.
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Lightning is a ________ of electrical current from
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How do you treat someone suffering from electrical shock after you secure the source? .A.c
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Air or noncondensable gas is removed from a refrigeration system by a .A.separating chambe
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______of milk is left in the refrigerator. You need to buy______from the supermarket.A.Som
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It can be inferred from Paragraph Five that______.A.the ESFI inspects household electrical
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