关于位移与路程,下列说法中正确的是( ) A.在某一段时间内物体运动的位移为零,

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问题:

关于位移与路程,下列说法中正确的是(  )

A.在某一段时间内物体运动的位移为零,则该物体一定是静止的

B.在某一段时间内物体运动的路程为零,则该物体一定是静止的

C.在直线运动中,物体的位移大小一定等于其路程

D.在曲线运动中,物体的位移大小可能大于其路程

考点:路程和位移
题型:选择题

In the supermarket you would also find many frozen foods --- frozen fruits, vegetables, meat and fish. As techniques for 5.__________ (freeze) food are being improved, more frozen foods are appearing on the market, and more people are buying them. Fruits and vegetable to be sold in the supermarket are often frozen the moment 6._______are picked. The     7._________fruits and vegetable are frozen, the better.8._______machines are often taken into the fields where9.__________food grows, so that little time is lost 10.__________picking and freezing.

题型:选择题

出现5P征表示()

A.桡骨头半脱位 

B.肱骨髁上骨折 

C.前臂筋膜室间隔综合征 

D.肩关节脱位 

E.肩锁关节脱位

题型:选择题

Holiday is ___ time for leisure.  But making good use of ___ time is not an easy task for most people.  [ ]

A.  the; the  

B.  a; the  

C.  the; a              

D. 不填;不填

题型:选择题

作为职业活动内在的道德准则,“审慎”要求从业人员要做到()。

A.凡事请示之后再做

B.少说多做

C.以最佳手段实现最优绩效

D.避免职场陷阱

题型:选择题

患者男性,12岁。突发神志障碍2小时。查体:呼吸慢,血压增高,右侧瞳孔散大,双侧对光反射消失。头颅CT示右侧颞叶血肿

最可能的诊断为()

A.脑瘤出血

B.脑动脉瘤破裂出血

C.脑动静脉畸形出血

D.Moya-Moya病

E.出血性脑梗塞

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