掘进工作面的配电点，大都设在掘进巷道的一侧或掘进巷道的母通巷道内，一般距工作面80～100m处。（）
参考答案：对
下颌第一磨牙近中颊尖咬在上颌第一，磨牙的近中颊沟属于（）
A.个别正常
B.理想正常
C.错
D.近中错
E.远中错
It was along the Mississippi River ______ Mark Twain spent much of his childhood _____ the story happened.
A. which; that B. that; which C where; that D. that ;that
