倾斜煤层长壁工作面顶板管理中倾角为25°~35°时，支柱迎山角一般取（）。
A.1°~2°
B.2°~5°
C.3°~5°
参考答案：C
Something must be done now to change the situation _______ top students dominate everything in our English learning class.
A．when
B．that
C．where
D．which
简述架空线路的接户线安装操作工艺。
