What's the _______ of having a public open space where you can't eat, drink or even simply hang out for a while?
A:sense
B:matter
C:case
D:opinion
45×12= ____
45×3= ____
45×0= ____
45×1= ____
0×45= ____
0×3= ____
第一次世界大战前形成的帝国主义两大军事侵略集团的核心是( )
①骨骼肌收缩 ②肌肉附着的骨收到牵拉产生动作 ③骨骼肌接受神经传来的兴奋
计算(﹣2.5)×0.37×1.25×(﹣4)×(﹣8)的值为____