【简答题】电力线路一般以什么样的等值电路来表示?等值电路有哪些主要参数?这些参数各反映什么物理现象?
【多选题】下列说法错误的是
A.
连接件的需用切应力等于剪切破坏实验得到的强度极限
【简答题】剪切面面积等于剪切面的实际面积,挤压面面积不等于接触面的实际面积,平面接触面是挤压面面积等于平面的面积,半圆柱面接触时挤压面面积等于__ ____。
【单选题】It is reported that most passengers escaped serious ()(伤害) in the accident.
【单选题】在分娩过程中,因产妇的精神心理因素不会带来的改变是
【单选题】连续精馏塔设计时,当采用塔顶全凝器、泡点回流方案时,为完成分离任务所需理论板数为N。若采用塔顶分凝器,而回流比和前方案相同时,则完成同样分离任务所需理论板数为Nˊ,其相对大小是______。 (A)Nˊ>N; (B)Nˊ=N;(C)Nˊ<N; (D)判断依据不足。
【单选题】His illness is _____ than before.
【简答题】What serious skin irritant is found in most commercial tile cleaners?
【单选题】_________ you may have, you should gather your courage to face the challenge.
A.
However a serious problem
B.
What a serious problem
C.
However serious a problem
D.
What serious a problem