To their great relief, the missing child returned home, ________, after an absence of two weeks. [ ]

A. felt tired and sound

B. tiring and soundly

C. feeling tired but soundly

D. tired but sound

PQS控制屏准确停车靠“点车”来实现，下降时的操作顺序随载荷不同而有区别.轻中载场合下，操作顺序为（）

A.零位→二档→一档→零位

b.零位→二档→零位

C.零位→三档→零位