题型:选择题 ---How did you do in the test yesterday? -----Not so well. I ______ much better but I misread the directions for writing。A.will have doneB.could have doneC.must have doneD.may have done 查看答案
题型:选择题 关于热现象和热学规律,下列说法中正确的是( )A.随着低温技术的发展.我们可以使温度逐渐降低,并最终达到绝对零度B.热量是不可能从低温物体传递给高温物体的C.第二类水动机不能制成是因为它违反了能量守恒定律D.用活塞压缩气缸里的空气,对空气做功 2.0×105J,同时空气向外界放出热量1.5×105 J,则空气的内能增加了0.5×105 J 查看答案