得数是43的算式是[ ]
A. 42+42÷6×7
B. 42+42÷(6×7)
C.(42+42)÷6×7
答案:B
开放性胸部损伤诊断的主要依据是()
A.胸部皮肤裂伤
B.气管或食管裂伤
C.肋骨骨折刺破胸膜
D.胸壁创口与胸膜腔相通
E.开放性肋骨骨折
It was early in the morning and the traffic was _________.
A.fluent
B.free
C.light
D.little