开放性胸外伤的诊断主要依据是()
A.胸壁有开放性伤口
B.食管破裂
C.肋骨骨折刺破胸膜
D.胸壁有创口与胸膜腔相通
参考答案:D
—I am afraid this pair of shoes is a little expensive.
—If you really want to buy them, I will give you a ____ of 10 percent.
A.quantity
B.amount
C.discount
D.account
为了防止火灾,施焊处离可燃物品的距离至少为()m,并应有防火材料遮挡。
A、2
B、5
C、10
D、20