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【判断题】
有固定转轴的物体的平衡条件是作用在物体上的总力矩等于零。A.
正确
B.
错误
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举一反三
【简答题】__________ turbulence is caused by convection currents resulting from insolation.
【简答题】Win7中文件中长度最能超过( )个字符
【简答题】选出与所给单词同类的单词。 ( ) 1. kite ( ) 2. play A. skipping rope A. fly B. soap B. Saturday
【简答题】A．lines B．channels C．paths D．currents
【单选题】By KCL, if currents entering a node is regared as +, the currents leaving the node is taken as
A.
plus
B.
minus
C.
positive
D.
zero
【多选题】Strong ocean currents are generated from a combination of temperature, wind, salinity, bathymetry, and the rotation of the Earth. The Sun acts as the primary driving force, causing _____________.
A.
winds
B.
currents
C.
temperature differences
D.
tides
【简答题】A) linesB) channelsC) pathsD) currents82. A) lines B) channels C) paths D) currents
【简答题】根据图片给单词分类。（写出英语单词） Food: ____________________________________________ Fruit: ___________________________________________
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