I don’t know _________.

A．what is the matter with him

B．what the matter is with him

C．what with him the matter is

D．what the matter with him is

船舶旋回运动中，漂角由大变小：（）.

A.速降加剧，转心前移

B.速降加剧，转心后移

C.速降减轻，转心前移

D.速降减轻，转心后移