0-6岁儿童口腔疾病筛查覆盖率=(该年辖区内接受口腔疾病筛查的0---6岁儿童人数/该年辖区内0-6岁儿童人数)*100%。
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中国电视行业的问题之一是缺少、不重视研发。
A. 正确
B. 错误
Refrigeration system compressor crankcase sweating is an indication of ().
A. insufficient lube oil circulating through the system
B. excessive circulation of lube oil through the system
C. insufficient refrigerant in the system
D. an overworked compressor