6.在相同荷载作用下，相同厚度的单面排水土层，渗透固结速度最慢的是：
A. 砂土地基
B. 粉土地基
C. 粘土地基
D. 碎石土地基
查看答案
有效应力σ′、孔隙水压力u之间存在的关系为：
A. σ=u-σ′
B. σ′=u-σ
C. σ′=σ-u
D. σ′=σ+u
What is cardiopulmonary resuscitation ?
How many kinds of CPR are there?What are they, respectively?
A. One type is the use of “hands and month breathing CPR”.
B. The other type is the use of “Hands-Only CPR”.
When is CPR needed by the patient?
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