若有说明:int a[][3]={{1,2,3},{4,5},{6,7}};则数组a的第一维的大小为( )
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The band's success has ____hundreds of would-be imitators.
The ____is trying to get the message across to young people that drugs are dangerous.
Elementary school children responded favourably to the robotic teachers, the minister said, ____a survey by educational researchers.
Everyone of us should have the ____of preserving our natural environment.