题目

You ________ pay too much attention to your reading skill, as it is so important. A．shouldn't        B． can't        C．mustn't        D．needn't 答案：B下列说法正确的是A.温度是分子内能大小的标志B.物体吸热温度一定升高C.物体不吸热温度可能升高D.温度高的物体具有较多热量