A . The detergency；the alkalinity
B . The alkalinity；the detergency
C . The inhabitant；the water
D . The additives；the distilled water
[名词解释] 核酸（Nucleic acid）
[单选题]They found the conditions there ________.A.much improveB.much to improveC.m
[名词解释] 酸洗除垢acid descaling
[名词解释] 抗酸杆菌（acid-fastbacilli）
[单选题]Acid solution（） in the system can be tested from time to time by putting some on to a piece of lime.A . strengthB . denseC . percentageD . velocity
[名词解释] 脂肪酸（fatty acid）
[名词解释] 胡敏酸 humic acid
[名词解释] 富啡酸 fulvic acid
[单选题]Which of the following conditions will make a relation that is in first normal form. to be in second normal form?Ⅰ.every non-key attribute is functionally dependent on the full set of primary key attributes.Ⅱ.no non-key attributes exist in the relati
[单选题]Which of the conditions listed will cause a refrigeration compressor to run constantly without simultaneously decreasing the temperature in the refrigerated space?( )A．Shortage of refrigerant oilB．Slight shortage of refrigerantC．Excessive condenser c