工程施工时,土石方调配与场地平整的施工方案一般不能依据地形图进行设计。()
参考答案:错
— Would you tell us something about the city ____ you grew up?
— OK. It was very beautiful. [ ]
A. where
B. there
C. that
D. which
如图所示,质量分别为mA和mB的物体A、B用细绳连接后跨过滑轮,A静止在倾角为45º的斜面上,B悬挂着。已知mA=2mB,不计滑轮摩擦,现将斜面倾角由45º增大到50º,系统保持静止。下列说法正确的是( )
A.绳子对A的拉力将增大
B.物体A对斜面的压力将增大
C.物体A受到的静摩擦力增大
D.物体A受到的静摩擦力减小