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【判断题】
包装辅助材料不属于包装材料。A.
正确
B.
错误
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举一反三
【单选题】Medium scale charts normally have a scale of around 1: 30,000 and are normally _____________.
A.
natural scale charts
B.
reference charts
C.
coastal charts
D.
harbor charts
【简答题】已知函数 与 的定义域为 ，有下列5个命题： ①若 ，则 的图象自身关于直线 轴对称； ② 与 的图象关于直线 对称； ③函数 与 的图象关于 轴对称； ④ 为奇函数，且 图象关于直线 对称，则 周期为2； ⑤ 为偶函数， 为奇函数，且 ，则 周期为2。 其中正确命题的序号为 。
【单选题】Have you ever heard the old saying 'Never judge a egg by its shell'? This is a good rule to follow when trying to judge the intelligence(智力) of others. Some people have minds that shine only in certai...
A.
a good writer is always a good speaker
B.
a good writer may not be a good speaker
C.
a good writer will find himself speechless
D.
a speechless person always writes well
【单选题】Do you agree to the old saying ______ absence makes the heart grow fonder?
A.
since
B.
when
C.
that
D.
as
【单选题】Have you ever heard the old saying 'Never judge a egg by its shell'? This is a good rule to follow when trying to judge the intelligence (智力) of others. Some people have minds that shine only in certa...
A.
a good writer is always a good speaker
B.
a good writer may not be a good speaker
C.
a good writer will find himself speechless
D.
a speechless person always writes well
【单选题】下列关于巴斯德菌病的描述错误的是( )
A.
该病的病原是美人鱼发光杆菌杀鱼亚种
B.
该病主要危害幼鱼
C.
该病主要在温度20C以下流行
D.
该病流行季节从春末至夏季
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