【单选题】_____ most of these languages are now threatened and may disappear is a serious matter to the people in Britain.
【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__ ____。
【简答题】If the number of cars is cut down,the most serious problem to American workers is to____________.
【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】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