颈胸部手术后采用 ( )
A．去枕平卧位B．去枕侧卧位C．15°～30°斜坡卧位D．高坡卧位E．低坡卧位
参考答案：D
Lucy is the________ of the twins, and she is the_______ girl in her class.
A．younger; younger
B．youngest; youngest
C．younger; youngest
D．youngest; younger
SF3102型电动轮自卸汽车的最大时速为（）。
A.40km/h
B.45km/h
C.50km/h
D.60km/h
