Jackson returned to Seattle for a while, ______ to Canada, and worked a few jobs there before heading for New York .

A．moving

B．moved

C．being moved

D．having moved

单锚泊时，系留力包括锚的抓力和链的抓力，其中链的抓力与卧底链长和单位长度链重有关：（）.

A.卧底链长越长，链的抓力越大；锚链越重，链的抓力越大

B.卧底链长越长，链的抓力越小；锚链越重，链的抓力越大

C.卧底链长越长，链的抓力越大；锚链越重，链的抓力越小

D.卧底链长越长，链的抓力越小；锚链越重，链的抓力越小