在○里填上合适的符号。( )
20○8=28 1元○40分=6角
A.+ +
B.+ -
C.- -
D.- +
答案:B
Everyone will go through life's stages of ups and downs, _____ self-respect plays a key role in the maturity
of a person. [ ]
A. when
B. which
C. as
D. that
9个月小儿患肺炎,半天来突然烦躁,气急加重,青紫。体检:呼吸60次/分,心率180次/分,心音低钝,两肺叩诊呈清音,可闻及密集中小水泡音,肝脏右肋下3cm。心电图示心率快,T波低平。此患儿可能合并:
A.脓胸
B.气胸
C.心力衰竭
D.纵隔气肿
E.肺不张