蓝氏贾第鞭毛虫病原学检查,粪便检查,急性期取新鲜标本做()(水样稀便)。慢性期成形粪便内见包囊,由于包囊排出具有间断性,需隔日检查1次,连续检查3次以上。
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学校教育和社会教育属于公共教育。
A. 正确
B. 错误
My Deratization Exemption Certificate will become ()on the 16th of September.
A. due
B. expire
C. lawful
D. non-effective
During (), the starting air valves should be closed to prevent the engine from turning.
A. overhaul
B. running
C. blowing down
D. All of the above are correct