【单选题】一物体以初速度 v 0 做匀减速直线运动,第 1 s 内通过的位移 x 1 = 3 m ,第 2 s 内通过的位移 x 2 = 2 m ,又经过位移 x 3 物体的速度减小为 0 ,则下列说法错误的是
D.
位移 x 3 内的平均速度大小为 0.75 m/s
【简答题】The best of the Puritan poets in colonial period was Edward _____.
【单选题】Lives of the Poets consists of the biographies of 52 poets and affords some of the best-known pictures of the early English poets. Its author is______.
【单选题】Do you get _______ to tell me? [ ]
A.
something exciting else
B.
something else exciting
C.
anything exciting else
D.
anything else exciting
【单选题】_____to somebody,a British person often shakes hands with the stranger.
【单选题】The “confederation school” poets of nineteenth-century Canada were primarily nature poets, ______ a wealth of eulogies to Canadian rural life.
【单选题】一物体以初速度 v 0 做匀减速直线运动,第 1 s 内通过的位移为 x 1 = 3 m ,第 2 s 内通过的位移为 x 2 = 2 m ,又经过位移 x 3 物体的速度减小为 0 ,则下列说法错误的是 ( )
D.
位移 x 3 内的平均速度大小为 0.75 m /s
【单选题】患者发生气道异物梗阻时,可以听到异物冲击性的高啼声,可以判定为____。
【简答题】已知X~B(n,p),EX =8,DX =1.6,则n与p的值分别是 、 ;