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【判断题】
实验动物微生物和寄生虫的检测频率要求：普通动物、清洁动物、无特定病原体动物，每六个月至少检测动物一次；无菌动物，每年至少检测动物一次。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】They were 150___ at the international conference this summer.
A.
spectators
B.
viewers
C.
participants
D.
onlookers
【单选题】The closing inventory at cost of a company at 31 January 20X3 amounted to $284,700.The following items were included at cost in the total:1 400 coats, which had cost $80 each and normally sold for $15...
A.
$281,200
B.
$282,800
C.
$329,200
D.
None of these
【单选题】The closing inventory at cost of a company at 31 January 20X3 amounted to $284,700.The following items were included at cost in the total:1. 400 coats, which had cost $80 each and normally sold for $1...
A.
$281,200
B.
$282,800
C.
$329,200
D.
$276,400
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