建筑桩基采用概率极限状态设计法，以（）指标度量桩基可靠度。
A.安全系数
B.桩基安全等级
C.可靠指标
D.建筑桩基重要性系数
参考答案：C
The closer the blood relationship between two people, the closer they are in intelligence. If we take two unrelated people _____, their degree of intelligence might be completely different.
A．at ease
B．at random
C．in the flesh
D．in many ways
开放性气胸急救时封闭胸壁伤口是为了（）。
A．变开放性气胸为闭合性气胸
B．控制胸壁出血
C．防止伤侧肺进一步萎陷
D．消除纵隔摆动
E．恢复胸膜腔负压
