张力性气胸特有的体征是()
A.进行性呼吸困难
B.发绀
C.肺部叩诊高调鼓音
D.皮下或纵隔气肿
E.肺肝浊音界下移
参考答案:D
It's not good to be late _____ school. [ ]
A. to
B. for
C. with
D. without
若沥青混合料的油石比为5.0%,则沥青含量为______。
A.4.76% B.4.56% C.5.00% D.5.26%