________us calmly together,our captain made an announcement   _______ we must save only essential supplies before the ship sank.   [ ]

A.  Calling ; that                                      

B. To  call ; that  

C.  Calling ; which                                  

D. To  call ; which

引起弥散量增加的有（）

A.先天性心脏病

B.风湿性心脏病

C.红细胞增多症

D.贫血

E.肺出血