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【单选题】
正常情况下,当IC脚间距≤0.5mm时,该器件MARK标识,以提高该IC的贴装精度。但若布线太密,允许仅对( )及其以下的器件增加MARK标识。A.
0.8mm
B.
0.65mm
C.
0.5mm
D.
0.4mm
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举一反三
【单选题】关于层片的论述正确的是( )
A.
层片是按照植物的高度划分的
B.
层片和层的含义基本相同
C.
兴安落叶松群落是单优势林，其乔木层和层片是一致的
D.
群落有几个层次就有几个层片
【单选题】_________ ,people are beginning to realize how serious the situation is. [ ]
A.
Fortunate
B.
Fortunately
C.
Being fortunate
D.
Being fortunately
【单选题】______, people are beginning to realize how serious this situation is.
A.
Fortunate
B.
Fortunately
C.
Being fortunate
D.
being fortunately
【简答题】中国居民膳食结构中,摄入量低于推荐量的是 、 、 ,远低于推荐量的是 和 。摄入量过多的是 。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】More and more people are beginning to learn English, ______can partly explain the booming of language training centers in China.
A.
which
B.
what
C.
that
D.
it
【简答题】Meeting people from another culture can be difficult. From the beginning, people may send the wrong signal (信号). Or they may pay no attention to signals from another person who is trying to develop a ...
【简答题】Meeting people from another culture can be difficult. From the beginning, people may send the wrong signal. Or they may pay no attention to signals from another person who is trying to develop a relat...
【单选题】关于层片的论述,正确的是
A.
层片是按植物的高度划分的
B.
层和层片含义基本相同
C.
兴安落叶松群落是单优势林，其乔木层与层片是一致的
D.
群落有几个层次，就有几个层片
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