【单选题】1 A magazine's design is more than decoration, more than simple packaging. It expresses the magazine's very character. The Atlantic Monthly has long attempted to provide a design environment in which ...
A.
variation in the typefaces.
B.
reorganization of articles in the front.
C.
creation of the travel column.
D.
reinstatement of its former name.
【单选题】write what it prints out after the below code being excuted. x = 6 if x > 1 : print('More than 1') if x > 10 : print('more than 10')
C.
More than 1 More than 10
【单选题】关于机械能守恒定律的适用条件,下列说法正确的是
B.
当有其他外力作用时,只要合外力为零,机械能就守恒
C.
当有其他外力作用时,只要其他外力不做功,机械能就守恒
D.
炮弹在空中飞行不计阻力时,仅受重力作用,所以爆炸前后机械能守恒
【单选题】下列关于机械能是否守恒的说法中正确的是( )
A.
.做匀速直 线运动的物体的机械能一定守恒 [ 来源 : 学 + 科 + 网 ]
C.
.运动物体只要不受摩擦阻力作用,其机械能一定守恒
D.
.物体只发生动能和势能的相互转化,物体的机械能一定守恒