She was knocked by a car and now is stil_爱下问搜题

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问题选择题

She was knocked by a car and now is still ．

A．down; in danger

B．off; dangerous

C．down; dangerous

D．off; in danger

答案

答案：A

单项选择题

某土样的天然重度γ=18kN/m³，含水量w=20%，土粒比重d_s=2.7，则土的干密度ρ_d为：

A.15kN/m³

B.1.5g/m³

C.1.5g/cm³

D.1.5t/cm³

多项选择题

化脓性细菌侵入胸膜腔的途径有（）

A.继发于肺部感染

B.继发于邻近脏器感染

C.血源性感染

D.继发于开放性胸外伤如开放性气胸

E.继发于胸腔手术后