皮皮学，免费搜题
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【多选题】
空气净化系统验证的主要项目()A.
风管安装确认
B.
过滤器检漏
C.
尘埃粒子数和微生物数
D.
风速、换气次数
E.
温湿度、压差指示
F.
操作人员卫生和洁净服清洗
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皮皮学刷刷变学霸
举一反三
【简答题】. big the tree is!
【单选题】听力原文：M: I'll take three cases and will you please deliver them and put them down to my account? W: I'll as usual, sir. What does the man mean?
A.
He will not pay in cash.
B.
He will put down three cases.
C.
He will take three cases home.
D.
He will count up m three cases.
【简答题】As a school librarian，I’m often asked what books are most appropriate for teaching particularconcepts．As the mother of a toddler ，I’m now teaching my son to recognize letters and learn thealphabet．Boa...
【判断题】Professors' teaching styles differ greatly, but in most cases, the approach is collective and collaborative.
A.
正确
B.
错误
【简答题】In most cases in China, teaching is generally based on a ( ) provided to teachers.
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