答案:C
The health official said ______ 12 suspected cases of influenza A (H1N1) were tested negative and ______, so far, this city has reported no case of the virus.
A.what; that
B.that; what
C.不填; that
D.that; 不填
肺组织弥散功能障碍时引起单纯缺氧是由于()
A.氧的弥散能力是二氧化碳的1/20
B.氧的弥散能力是二氧化碳的20倍
C.氧的弥散能力是二氧化碳的1/30
D.氧的弥散能力是二氧化碳的30倍
E.氧的弥散能力是二氧化碳的1/10