A:若ΔH﹤0, ΔS﹥0,任何温度下都能自发进行
B:若ΔH﹥0, ΔS﹤0, 任何温度下都不能自发进行
C:若ΔH﹥0 ,ΔS﹥0 ,低温时可自发进行
D:若ΔH﹤0 ,ΔS﹤0 ,低温时可自发进行
如图,木块下面用细线悬挂一个实心铁球,木块仍浮在水面上.下列各种说法中正确的是( )
下列说法中正确的是( )
如果a>b,那么下列不等式一定成立的是( )
We go shopping on Sunday. My father likes fruits very much. We buy some bananas and red apples at the fruit shop. My mother likes to wear new clothes. She buys a new sweater and a new skirt at the clothes shop. I buy three books at the book shop. At last(最后),we buy some tea for my grandfather in a tea shop.