【多选题】关于简谐运动的下列说法中,正确的是( )
C.
物体的运动方向指向平衡位置时,速度方向跟位移方向相反;背向平衡位置时,速度方向跟位移方向相同
D.
水平弹簧振子朝左运动时,加速度方向跟速度方向相同,朝右运动时,加速度方向跟速度方向相反
【多选题】( 多选 ) 关于简谐运动的下列说法中,正确的是 ( )
C.
物体的运动方向指向平衡位置时,速度方向跟位移方向相反;背向平衡位置时,速度方向跟位移方向相同
D.
水平弹簧振子朝左运动时,加速度方向跟速度方向相同,朝右运动时,加速度方向跟速度方向相反
【单选题】In the West, the emphasis is on what a man or woman does for a living. Here in the U.S., if you ask children what their fathers do, riley will say 'My daddy drives a truck' or 'My daddy is an engineer...
A.
what occupation you are engaged in
B.
what company you are employed by
C.
whether your job is stable
D.
whether you earn a good salary
【多选题】注册会计师与被审计单位签订长期审计业务约定书,但如果出现下列情况,应对考虑重新签订审计业务约定书的有()
【单选题】What does the headline " Chinese Spreading Across U.S." mean?
A.
Chinese Will Spread Across U.S.
B.
Chinese Are Spreading Across U.S.
【单选题】—Can you ride a horse? —Sorry, I____________ .But I can ride a bike very well.
【单选题】It is true that______.
A.
the average man often uses in his own vocabulary what was once technical language not meant for him
B.
various professions and occupations often interchange their dialects and jargons
C.
everyone is interested in scientific findings
D.
an educated person would be expected to know most technical terms
【单选题】运输向用户提供的是一种服务,是形成( )的主要手段
【单选题】在默认状态下,单元格内输入1/4时,显示为( )。